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Chapter 5: Infection Flashcards

1
Q

Name the antibiotics in the aminoglycoside class x5

A 
Amikacin
Gentamicin
Neomycin
Streptomycin
Tobramycin
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2
Q

What aminoglycosides are active against Pseudomonas aeruginosa (x3) and what one is the treatment of choice?

A

Gentamicin - treatment of choice

Amikacin
Tobramycin - usually via inhalation in CF

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3
Q

What aminoglycoside is active against TB? Against what bacteria?

A

Streptomycin
(mainly reserved for this indication)
Mycobacterium tuberulosis

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4
Q

Can aminoglycosides be given orally?

A

No- destroyed by the gut so must be given via injection

Are not absorbed from the gut (risk of absorption in inflammatory bowel disease and liver failure) and must be given by injection for systemic infections.

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5
Q

Is gentamicin a broad or narrow antibiotic?

What strains does it have poor activity against?

A

Broad but it is inactive against anaerobes and poor activity against haemolytic streptococci and pneumococci

Very good for gram negative organisms

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6
Q

Which aminoglycoside is used for encocarditis?

If it is resistant to this, what is an alternative aminoglycoside?

A

Gentamicin plus another antibiotic

Streptomycin is an alternative if resistant to gentamicin

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7
Q

Are aminoglycosides more active against gram positive or gram negative?

A

Gram negative but are broad

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8
Q

Can neomycin be given IV?

A

No
too toxic

Can only be used for skin/mucous membrane infections… However BNF states the cream is less suitable for prescribing

(Can also be used to reduce the bacterial population of the colon prior to bowel surgery or in hepatic impairment)

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9
Q

What is the problem with using aminoglycosides in myasthenia gravis?

A

Contraindicated

May impair neuromuscular transmission

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10
Q

What antibiotics can be used for prophylaxis in rheumatic fever?

A

Pen V or sulfadiazine

phenoxymethylpenicillin

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11
Q

What anitbiotics can be used for prevention of secondary case of menincoccal meningitis?

A

Ciprofloxacin or rifampicin

Or IM ceftriaxone (unlicensed)

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12
Q

What antibiotic can be used for prevention of secondary infection for Group A strep?

A

Pen V
Phenoxymethylpenicillin

pen allergic - erythromycin or azithromycin

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13
Q

What antibiotic can be used for prevention of secondary infection in Influenza Type B?

A

Rifampicin

If rifampicin cannot be used – IM or IV ceftriaxone

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14
Q

What antibiotic can be used for prevention of secondary cases of diphtheria in non-immune patients?

A

Erythromycin (or another macrolide e.g. azithromycin or clarithromycin)

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15
Q

What is pertussis?

A

Whooping cough

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16
Q

What antibiotic is used for prophylaxis of pertussis (whooping cough)?

A

Clarithromycin

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17
Q

What antibiotic is used post splenectomy or in patients with sickle cell disease for prevention of pneumococcal infection?

A

Pen V

Erythromycin is penicillin allergic

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18
Q

What antibacterial prophylaxis/treatment is used in animal and human bites?

If the patient is penicillin allergic, what should be used instead?

A

Co-amox

If penicillin allergic: Doxycycline and metronidazole

Up to 5 days and give tetanus jab

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19
Q

What antibacterial prophylaxis do you use in hip and knee replacement?

A

Single dose IV cefuroxime

OR IV flucloxacillin + IV gent

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20
Q

What antibacterial prophylaxis do you use in high lower limb amputation?

A

Use i/v co-amoxiclav alone or i/v cefuroxime + i/v metronidazole

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21
Q

What antibacterial prophylaxis do you use in caesarean section?

A

Single dose IV cefuroxime

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22
Q

What is 1st line for aspergillosis?

What is 2nd line if this cannot be used?

A

Voriconazole

Liposomal amphotericin

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23
Q

If a patient with aspergillosis is intolerant/refractory to voriconazole and liposomal amphotericin, what other antifungals can be used?

A

Caspofungin

Itraconazole

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24
Q

What antifungal is used in vaginal candidiasis?

For resistant organisms, what can be used?

A

Locally acting antifungals or with fluconazole given by mouth.

Itraconazole PO as an alternative for resistant organisms

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25
What is micafungin licensed for?
Invasive candidiasis Oesophageal candidiasis Prophylaxis of candidiasis in patients undergoing bone marrow transplantation or who are expected to become neutropenic for over 10 days
26
Cryptococcal meningitis, a fungal infection, is especially common in which group of immunocompromised patients? How is this treated?
HIV positive IV amphotericin & IV flucytosine followed by PO fluconazole
27
What is tinea capitis?
Fungal infection (ringworm) of scalp
28
What is tinea pedis?
Athlete's foot
29
How do you treat tinea captis?
Systemically Griseofulvin Can also used an additional topical application
30
True or false: In fungal nail infections, topical therapy is more effective than systemic
False Systemic is more effective
31
Is fluconazole active against Aspergillus?
No
32
Is caspofungin effective against CNS fungal infections?
No
33
What is the advantage of lipid amphotericin formulations over conventional amphotericin?
Significantly less toxic and are recommended when the conventional formulation of amphotericin is contra-indicated because of toxicity, especially nephrotoxicity or when response to conventional amphotericin is inadequate However, more expensive
34
What are echinocandin antifungals active against? (Caspofungin, micafungin)
Aspergillus and Candida Not active against CNS fungal infections
35
What can be used for MRSA?
Glycopeptides mainly: Teicoplanin Vancomycin Alternatives: Tigecyline Daptomycin Linezolid (if glycopeptide unsuitable) Tetracyclines can be used for skin or soft tissue infections or UTI caused by MRSA Clindamycin can be used for bone and joint MRSA infections
36
Are carbapenems useful against MRSA?
No
37
Do carbapenems have good activity against pseudomonas? What is the exception to this?
Yes apart from ertapenem
38
Why does imipenem have to be administered with cilastatin?
Imipenem is partially inactivated in the kidney by enzymatic activity and is therefore administered in combination with cilastatin, a specific enzyme inhibitor, which blocks its renal metabolism
39
If meningitis is suspected, what antibiotic should be given before being transferred to hospital (as long as this doesn't delay treatment)? What would be an alternative?
IV benpen Cefotaxime if penicillin allergic / chloramphenicol if history of immediate hypersensitivity to penicillin and cephalosporins
40
When would you use dexamethasone in meningitis? In what situations would you avoid this?
Particularly in pneumococcal meningitis in adults, either before starting antibacterial therapy or within 12 hours of starting Avoid using dex in septic shock, meningococcal septicaemia, immunocompromised, or meningitis following surgery
41
What is the recommended antibiotic therapy for children 3 months - adults 50 years in meningitis if the cause is unknown? What is the suggested duration of treatment?
Cefotaxime or ceftriaxone Consider adding vancomycin 10 days
42
What is the recommended antibiotic therapy for adults over 50 years in meningitis if the cause is unknown? What is the suggested duration of treatment?
Cefotaxime or ceftriaxone AND amoxicillin or ampicillin Consider adding vanc 10 days
43
What is the recommended antibacterial therapy for meningitis caused by meningococci (neisseria)? What would be an alternative if not suitable? What is the suggested duration of treatment?
Benpen Or cefotaxime/ceftriaxone Chloramphenicol is an alternative if history of immediate hypersensitivity to penicillins or cephalosporins 7 days
44
What bacteria can be the cause of meningitis?
Meningococcal (neisseria) Pneumococcal Haemophilus influenzae Listeria
45
What is the recommended antibacterial therapy for meningitis caused by pneumococcal? If the organism if penicillin and cephalosporin resistant, what can be added? What is the suggested duration of treatment?
Cefotaxime or ceftriaxone Consider adding dex before first dose or within 12 hours of starting antibacterial therapy If penicillin sensitive, change to benpen If penicillin and cephalosporin resistant, vancomycin and rifampicin can be added 14 days
46
What is the recommended antibacterial therapy for meningitis caused by Haemophilus influenzae? What is the suggested duration of treatment?
Cefotaxime or ceftriaxone Consider adding dex before first dose or within 12 hours of starting antibacterial therapy 10 days
47
What is the recommended antibacterial therapy for meningitis caused by Listeria? What is the suggested duration of treatment? If history of immediate penicillin hypersensitivity, what could be an alternative?
Amoxicillin/ampicillin AND gentamicin 21 days - can consider stopping gentamicin after 7 days Alternative- co-trimoxazole for 21 days
48
How should the following be managed: | Patients presenting with sinusitis symptoms of 10 days or less
Paracetamol, ibuprofen, nasal saline Antibiotics not usually required
49
How should the following be managed: | Patients presenting with sinusitis symptoms of 10 days or more
Could be considered for treatment with a high-dose nasal corticosteroid, such as mometasone furoate [unlicensed use] or fluticasone [unlicensed use] for 14 days. Supply of a back-up antibiotic prescription could be considered and used if symptoms do not improve within 7 days, or if they worsen rapidly or significantly.
50
In what situations would you offer antibiotics for sinusitis?
Should only be offered to patients with acute sinusitis who are systemically very unwell, have signs and symptoms of a more serious illness Or if bacterial sinusitis is suspected
51
How should the following be managed: | Patients presenting with sinusitis symptoms of 10 days or more
Could be considered for treatment with a high-dose nasal corticosteroid, such as mometasone furoate [unlicensed use] or fluticasone [unlicensed use] for 14 days. Supply of a back-up antibiotic prescription could be considered and used if symptoms do not improve within 7 days, or if they worsen rapidly or significantly.
52
What is 1st and 2nd line in a non-penicillin allergic sinusitis patient if antibiotics are indicated?
1st line- Pen V | 2nd line- Co-amox especially if more serious illness
53
What is 1st line in a penicillin allergic sinusitis patient if antibiotics are indicated?
Doxycycline or clarithyromycin
54
What is 1st line in a penicillin allergic sinusitis PREGNANT patient if antibiotics are indicated?
Erythromycin
55
What antibiotic can be used in a pregnant UTI patient?
Cefalexin
56
If antibiotics are clinically appropriate, what would be used for otitis externa? What if the patient is penicillin allergic?
Flucloxacillin Clarithromycin
57
If antibiotics are clinically appropriate, what would be used for otitis media? What if the patient is penicillin allergic?
Amoxicillin (or co-amox as second line) Clarithromycin
58
Otitis media is most common in which age group?
Children
59
What antibiotics are likely to cause C.Diff?
Clindamycin Penicillins Cephalosporins Fluoroquinolones
60
What 3 antibiotics can be used in C.Diff?
Vancomycin Metronidazole Fidaxomicin
61
For first episode of mild-moderate C.Diff, what should be used and for how long?
Oral metronidazole for 10-14 days
62
For second/subsequent C.Diff infection not responding to metronidazole, what can be used and for how long?
Oral vancomycin Fidaxomicin can be used for severe infection 10-14 days
63
What antibiotic is used for bacterial vaginosis and how long for?
Metronidazole 5-7 days
64
What antibiotics cover chlamydia?
Azithromycin (single dose) Doxycycline Erythromycin
65
What would you use to treat gonorrhoea? If the IM route is not possible, what would you use instead?
Single dose Azithromycin and IM ceftriaxone Cefixime instead (unlicensed)
66
What is the recommended length of treatment for osteomyelitis?
6 weeks
67
Osteomyelitis and septic arthritis antibiotic choice: 1. First line 2. If penicillin allergic 3. If MRSA suspected
1. Flucloxacillin 2. Clindamycin 3. Vancomycin or teicoplanin
68
What penicillins can you use for oral infections e.g. dental?
Pen V Amoxicillin However these are not effective against bacteria that produces beta lactamases Co-amox can be used in severe cases
69
What is the drug of choice for acute ulcerative gingivitis?
Metronidazole
70
Is haemophilus influenzae a bacteria or a virus?
Bacteria
71
What is the recommended therapy for Haemophilus influenzae?
Cefotaxime or ceftriaxone
72
What antibiotics do you use to treat an acute exacerbation of chronic bronchitis and how long for?
Amoxicillin or a tetracycline for 5 days
73
What antibiotic therapy is recommended in low severity CAP and how long for? What would be alternatives?
Amoxicillin Alternatives= doxycycline, clarithromycin 7 days (if infection caused by staph, it would be 14-21 days)
74
What antibiotic therapy is recommended in moderate severity CAP and how long for?
Amoxicillin AND clarithromycin Or doxycycline alone 7 days
75
What antibiotic therapy is recommended in high severity CAP and how long for?
Benpen AND clarithromycin/doxycycline 7-10 days If MRSA suspected, add teic/vanc
76
For life-threatening CAP, what would be the recommended treatment and how long for? If the patient was penicillin allergic, what would be the alternative?
Co-amox + clarithromycin 7-10 days Alternative to co-amox would be cefuroxime or ceftriaxone
77
In CAP, the usual treatment duration is 7-10 days. When would you extend this to 14-21 days?
If staphylococci suspected
78
If MSRA was suspected in CAP, what would you add on to the treatment?
Teic/vanc
79
What are the main organisms that cause pneumonia?
``` Streptococcus pneumoniae Haemophilus influenzae Chlamydia pneumoniae Mycoplasma pneumoniae Legionella pneumophila ```
80
What would you use to treat pneumonia caused by chlamydial/mycoplasma?
Doxycycline
81
What is the difference between early onset vs late onset HAP (in terms of days in hospital)?
Early onset = less than 5 days admission to hospital Late onset = more than 5 days after admission to hospital
82
How do you treat early onset HAP?
Co-amox or cefuroxime
83
How do you treat late onset HAP?
Antipseudomonal penicillin e.g. Pip Taz OR Broad spectrum cephalosporin e.g. ceftazidime OR Quinolone e.g. ciprofloxacin MRSA- add vanc
84
What would you use to treat a small area of impetigo?
Fusidic acid
85
What would you use to treat a widespread infection of impetigo? If penicillin allergic, what would be an alternative?
Oral flucloxacillin Clarithromycin
86
What would you use to treat cellulitis? If penicillin allergic, what can be used?
High dose flucloxacillin Clindamycin/clarithromycin
87
What antibiotic would you use for mastitis during breastfeeding? What if penicillin allergic?
Flucloxacillin Erythromycin 10-14 days
88
What are the side effects of aminoglycosides?
Hearing impairment (ototoxicity - patients should report tinnitus, hearing loss, vertigo) Nephrotoxicity May impair muscle transmission-c/i in myasthenia gravis
89
What is the risk of aminoglycosides to the infant in pregnancy?
Risk of auditory or vestibular nerve damage
90
What is a possible problem with carbapenems that means it is cautioned in CNS disorders?
Seizure inducing potential | Also increased risk of seizures if renal impairment is present
91
Should you give carbapenems if there is a history of immediate hypersensitivity to penicillins?
No
92
True or false: | Cephalosporins penetrate the meninges poorly unless they are inflamed
True
93
What are some common side effects of cephalosporins?
Abdo pain Eosoniphilia Thrombocytopenia
94
Should you give cephalosporins if there is a history of penicillin allergy?
Used in caution | But should not be given if there is immediate hypersensitivity
95
What are the glycopeptide antibiotics?
Dalbavancin Teicoplanin Telavancin Vancomycin
96
Which of the following antibiotics has a lower incidence of nephrotoxicity: Teicoplanin Vancomycin
Teicoplanin
97
What drugs are associated with red man syndrome?
Glycopeptides Teicoplanin Vancomycin
98
What is the main advice to give to patients on clindamycin and should stop taking if this happens?
Diarrhoea | Stop and contact doctor
99
What are the cautions in macrolides?
QT prolongation | and electrolyte disturbances
100
Amoxicillin can cause an increased risk of erythematous rash in what conditions?
Acute lymphocytic leukaemia Chronic lymphocytic leukaemia CMV Glandular fever
101
Why should you maintain adequate hydration with high doses of IV amoxicillin?
Risk of crystalluria | Especially in renal impairment
102
What is the dose of amoxicillin in susceptible infection for a child 1-11 months?
125mg TDS | increased up to 30mg/kg TDS if needed
103
What is the dose of amoxicillin in susceptible infection for a child 1-4 years?
250mg TDS | increased up to 30mg/kg TDS if needed
104
What is the dose of amoxicillin in susceptible infection for a child 5-11 years?
500mg TDS | increased up to 30mg/kg TDS if needed
105
What is the dose of amoxicillin in susceptible infection for a child 12-17 years?
500mg TDS | Increased up to 1g TDS if needed
106
What is the dose of amoxicillin in susceptible infection for an adult?
500mg TDS
107
What is the MHRA warning surrounding flucloxacillin?
Cholestatic jaundice and hepatitis
108
What is a side effect of oral amoxicillin and co-amox in terms of colouring the patient's tongue?
Black hairy tongue
109
Ciprofloxacin is a type of what antibiotic?
Quinolone
110
What is the important safety information regarding fluoroquinolones?
May induce convulsions in patients with or without a history of convulsions; taking NSAIDs at the same time may also induce them. Tendon damage (including rupture) has been reported rarely in patients receiving quinolones. Tendon rupture may occur within 48 hours of starting treatment Small increased risk of aortic aneurysm and dissection
111
Should quinolones be used in MRSA?
No
112
What quinolone is active against pseudomonas?
Ciprofloxacin
113
What are some common side effects of quinolones?
QT prolongation Hearing impairment Decreased appetite Rhabdomylosis Drug should be discontinued if psychiatric, neurological reactions occur Cautioned in young adults and children- risk of arthropathy
114
What antibiotic would you use for PCP prophylaxis and treatment?
Co-trimoxazole
115
What is a rare but serious side effect of co-trimoxazole?
Blood disorders | Rash - steven johnson's syndrome
116
What age group are tetracyclines contraindicated in?
Children < 12 due to deposition in growing bones and teeth | Staining of teeth can occur
117
What are the common side effects of tetracyclines?
Angiodema Henoch Schonlein purpura (spotty rash) Photosensitivity reaction Headaches and visual disturbances- may indicate benign intercranial hypertension - discontinue if intercranial pressure increases
118
Is there any special patient advice with doxycycline?
Should be taken with meals Avoid exposure to sunlight and sun lamps Do not take zinc, indigestion remedies 2 hours before or after
119
What is a serious side effect of chloramphenicol when given systemically?
Haemotological side effects (agranulocytosos, bone marrow disorder) Aplastic anaemia- reports of leukaemia Should only be reserved for life-threatening conditions e.g. typhoid fever
120
What muscle side effect can daptomycin cause?
Myopathy Report any muscle weakness and monitor creatine kinase if necessary Need to monitor CK twice a week whilst on it
121
What monitoring requirements are needed for systemic fusidic acid?
Elevated liver enzymes, hyperbilirubinaemia and jaundice can occur with systemic use Manufacturer advises monitor liver function with high doses or on prolonged therapy
122
What is the important safety information regarding linezolid?
Severe optic neuropathy- patients should report visual impairment Blood disorders - thrombocytopenia, anaemia,
123
What food does linezolid interact with and why?
Tyramine-rich foods (such as mature cheese, salami) Avoid consuming large amounts Also is a reversible MAOI
124
Is linezolid active against gram-ve, gram+ve or both?
Gram +ve
125
What would be the dose of trimethoprim in an adult for UTI?
200mg BD
126
Can you use trimethoprim in renal impairment?
Yes- monitor | May need to half normal dose
127
What is the patient advice surrounding rifampicin?
May stain contact lenses red Report signs of liver disorder May colour urine red - harmless
128
How does rifampicin interact with hormonal contraceptives?
Effectiveness of hormonal contraceptives are reduced - alternative method needed
129
What antibiotics are used in the initial phase of TB treatment?
Rifampicin Isoniazid Pyrazinamide Ethambutol Streptomycin- hardly used but may be useful if resistant to isoniazid
130
How many antibacterials are used in the initial phase of TB treatment and how long for?
4 2 months
131
How many antibacterials are used in the continuous phase of TB treatment and how long for?
2 4 months
132
If someone is isoniazid, what else must be prescribed and why?
Pyridoxine (vitamin B6) | Prophylaxis of isoniazid-induced neuropathy
133
Generally speaking, after 2 months of RIPE treatment for TB, what antibiotics are continued for a further 4 months?
Rifampicin and isoniazid (needs to be on pyridoxine for prevention of neuropathy)
134
What treatment for TB should be given in pregnancy and breastfeeding?
RIPE for 2 months and then RI (Rifampicin and isoniazid) for a further 4 months Should NOT be given streptomycin
135
DOT TB therapy should be offered to which groups of people?
Directly observed therapy should be offered to patients who: -Have a history of non-adherence; -Have previously been treated for tuberculosis; -Are in denial of the tuberculosis diagnosis; have multidrug-resistant tuberculosis; have a major psychiatric or cognitive disorder; -Have a history of homelessness, drug or alcohol misuse; -Are in prison, or have been in the past 5 years; -Are too ill to self-administer treatment; -Request directly observed therapy.
136
In a patient with HIV and TB, starting antiretrovirals in the first 2 months of TB treatment can increase the risk of what?
Immune reconstitution syndrome
137
In patients with HIV and TB, how long should the TB treatment be for? What is the exception to this?
6 months However if the TB has CNS involvement, 12 months max
138
What is the general TB treatment regimen?
RIPE for 2 months and then RI (Rifampicin and isoniazid) for a further 4 months
139
What is the general CNS TB treatment?
RIPE for 2 months and then RI (Rifampicin and isoniazid) for a further 10 months Initial high dose of dexamethasone or prednisolone should be started at the same time and slowly withdrawn over 4-8 weeks
140
What would be the treatment regimen for latent TB?
Isoniazid for 6 months - recommended if interactions with rifampicin a concern OR rifampicin and isoniazid for 3 months - recommended if hepatotoxicity a concern
141
A break in TB treatment of how many weeks is classed as a treatment interruption?
2 weeks
142
What are the 6 toxicity syndromes associated with intermittent TB treatment?
Influenza-like, abdominal, and respiratory symptoms, shock, renal failure, and thrombocytopenic purpura
143
What is the brand name of the medicine that contains RIPE for TB?
Voractiv
144
What is the brand name of medicine that contains RI (rifampicin and isoniazid) for TB?
Rifinah
145
Why is ethambutol cautioned in young children?
Can cause visual impairment Ethambutol should be used with caution in children until they are at least 5 years old and capable of reporting symptomatic visual changes accurately.
146
What kind of toxcity can ethambutol cause?
Ocular - report any visual disturbances Nephrotoxicity Other side effects include red-green colour blindness, hepatotoxicity
147
What are the main side effects to look out for in a patient on isoniazid?
Peripheral neuropathy Hepatic disorders Ototoxicity
148
What are the main side effects to look out for in a patient on pyrazinamide?
Hepatoxicity | Aggravates gout
149
What antibiotics respond to a lower UTI?
Trimethoprim Nitrofurantoin Amoxicillin Ampicillin Cefalexin
150
What is the recommended duration of treatment for uncomplicated UTI in women?
3 days
151
What antibiotics for a UTI should be used in pregnancy?
Penicillins and cephalosporins are the best choices
152
At what EGFR should you avoid prescribing nitrofurantoin in?
<45
153
Does does caspofungin interact with and what should be done about the dose?
Some enzyme inducers e.g. rifampicin, carbamazepine, phenytoin increase dose to 70mg daily (if not already on it)
154
What is the risk of giving an infusion of amphotericin?
Risk of arrhythmias if given too rapidly Anaphylaxis- test dose is needed and close observation is needed for first 30 mins after this test dose
155
What are some side effects of amphotericin?
- Abnormal hepatic function (discontinue) - Renal impairment - Agranulocytosis - Arrhythmias - Anaemia - Chills
156
Are different preparations of amphotericin interchangeable?
No Vary in PD, PK Should preferably prescribe by brand to avoid confusion
157
What are some side effects of fluconazole?
- QT prolongation - Oedema - If rash occurs, discontinue - could be SCARSs (severe cutaneous reaction)
158
What is a specific side effect with IV isavuconazole?
Infusion related reactions: Hypotension, SOB, paraesthesia Nausea, headache Discontinue if these occur
159
What is the important safety information regarding itraconazole?
Reports of heart failure, especially in high risk patients: - High dose and long courses - Patients on negative ionotropic drugs- CCBs - Elderly - Chronic heart disease Should be avoided in those with a history of heart failure unless the infection is serious Also, hepatotoxicity that can be life-threatening can occur. Patient should be aware of liver disorder signs
160
What are the specific side effects for voriconazole that requires patient counselling?
Hepatotoxicity- patients should be aware of liver disorder signs Phototoxicity- patients should avoid intense or prolonged exposure to direct sunlight, avoid sunbeds If they get sunburnt, seek medical attention It is the antifungal that is most associated with hallucinations Keep an alert card on them
161
What is the contraception and conception advice for both men and women who are on griseofulvin (antifungal for dermatophyte infections of the skin)?
Women: Should continue effective contraception at least 1 month after administration. The effectiveness of the pill may reduce so use an additional barrier method Men: Avoid fathering a child during and for at least 6 months after administration
162
What adjunctive therapy is recommended in PCP treatment in patients with HIV?
For moderate to severe infections, prednisolone for 21 days
163
True or false: | All members in a household must be treated if one person in the house has threadworm
True
164
What is the drug of choice for threadworm?
Mebendazole
165
For malaria prophylaxis, what are mosquito nets usually impregnated with?
Permethrin (insecticide)
166
Can DEET spray be used during pregnancy and breastfeeding?
Yes
167
When applying DEET and suncream, what should be applied first?
Suncream | Then DEET
168
How does DEET spray affect the SPF of suncream?
Lowers it so a factor 30-50 should be used
169
Generally speaking, how much time before travelling should malaria prophylaxis be started? What are the exceptions to this?
1-2 weeks before Mefloquine is 2-3 weeks before Malarone and doxycycline is 1-2 days before In warfarin patients- 2-3 weeks before
170
How much time before travelling should malaria prophylaxis with Malarone be started?
1-2 days before
171
How much time before travelling should malaria prophylaxis with doxycycline be started?
1-2 days before
172
How much time before travelling should malaria prophylaxis with mefloquine be started?
2-3 weeks before
173
How long can Malarone be used for in malaria prophylaxis?
Up to 1 year
174
How long can doxycycline be used for in malaria prophylaxis?
Up to 2 years
175
How long can mefloquine be used for in malaria prophylaxis?
Up to 1 year
176
What antimalarials are unsuitable for those with epilsepy? What would be alternatives?
Chloroquine Mefloquine Proguanil is recommended in areas with chloroquine resistance Doxycyline or Malarone is recommended in areas without chloroquine resistance
177
Which group of patients are at a particularly high risk of severe malaria?
Those without a spleen
178
What antimalarials can be given at their usual dose during pregnancy?
Chloroquine Proguanil However, resistance exists so may have to look at other options, only if benefit outweighs risk and travel is unavoidable
179
If a pregnant lady is on proguanil during malaria prophylaxis, what else must she be on?
Folic acid at high dose (5mg) for at least the first trimester
180
How long should malaria prophylaxis continue after leaving the at risk country? What is the exception to this?
Continue for 4 weeks after Except for Malarone which is 1 week
181
In warfarin patients, when should malaria prophylaxis begin?
2-3 weeks before travelling | INR should be stable before departure
182
When should INR be checked in warfarin patients on malaria prophylaxis?
Before starting the course 7 days after starting the course After completing the course For prolonged stays, INR needs to be checked at regular intervals
183
What is standby malaria treatment?
Travellers visiting remote, malarious areas for prolonged periods should carry standby treatment if they are likely to be more than 24 hours away from medical care. Self-medication should be avoided if medical help is accessible. In order to avoid excessive self-medication, the traveller should be provided with written instructions that urgent medical attention should be sought if fever (38°C or more) develops 7 days (or more) after arriving in a malarious area and that self-treatment is indicated if medical help is not available within 24 hours of fever onset.
184
When travelling to different places that require 2 different malaria prophylaxis regimens, what do you do?
The regimen for the higher risk area should be used for the whole journey
185
What combination of antimalarials is in Malarone/Maloff?
Atovaquone and proguanil
186
For the treatment of malaria, is the infective species is unknown/mixed, what are the options?
Malarone Riamet Quinine
187
What is P. Falciparum resistant to?
Chloroquine
188
What are the treatment options for malaria caused by P.Falciparum?
Quinine (with doxycycline or clindamycin) Malarone Riamet
189
What are the treatment options for malaria caused by P.Falciparum in pregnancy?
Quinine followed by clindamycin | cannot use doxycycline
190
What are the treatment options for non-falciparum malaria?
Chloroquine | However, if resistant- Malarone or Riamet
191
What are the treatment options for non-falciparum malaria in pregnancy?
Chloroquine
192
What antimalarials does Riamet contain?
Artemether and lumefantrine
193
What is the important safety information with chloroquine?
Occular toxicity | Very toxic in overdose
194
What are some side effects of chloroquine?
- QT prolongation - Seizures - Hypoglycaemia- cautioned in diabetes
195
What is a main neurological side effect of mefloquine?
Mefloquine is associated with potentially serious neuropsychiatric reactions. Abnormal dreams, insomnia, anxiety, and depression occur commonly. Therefore, contraindicated in those with history of psychiatric disorders including depression Has a long half life so can persist up to several months after discontinuation
196
What screening should be done before a patient starts taking primaquine and why?
G6PD as if deficient, can cause haemolysis
197
What is the difference between quinine sulphate and quinine bisulphate?
Bisulphate has less quinine in | Should not be used for malaria, only quinine sulphate
198
What is the important safety information regarding quinine?
QT prolongation
199
What are the initial treatment options for chronic Hep B?
Peginterferon alpha Interferon alpha Treatment with the above should be stopped if no improvement after 4 months Entecavir Tenofovir Treatment should be changed to other antivirals if no improvement after 6-9 months
200
What determines treatment route for chronic Hep C?
Before starting treatment, the genotype of the infecting hepatitis C virus should be determined and the viral load measured as this may affect the choice and duration of treatment.
201
What is used for the initial treatment of chronic Hep C?
Combination of ribavirin and peginterferon alpha Ribavirin monotherapy=ineffective
202
What is the MRHA warning regarding direct-acting antivirals to treat chronic Hep C?
Risk of interaction with Vitamin K antagonists and changes in INR. INR needs to be monitored closely Risk of Hep B reactivation (if patient has both B and C) Need to be screened for Hep B before starting treatment
203
What is herpes labialis?
Cold sore
204
What is herpes zoster?
Shingles
205
What is varicella?
Chicken pox
206
In shingles, within how many hours of rash onset should antivirals be started? How long is it continued for?
Within 72 hours Continued for 7-10 days
207
In adults with chickenpox, within how many hours of rash onset should antivirals be started to reduce duration and severity of symptoms?
Within 24 hours
208
What kind of drug is foscarnet?
Antiviral
209
What antivirals are used for CMV?
Ganciclovir IV Valganciclovir PO Foscaret - toxic and causes renal impairment
210
During CMV treatment, what does ganciclovir cause if given with zidovudine (for HIV)?
Myelosuppression
211
Initial treatment of HIV-1 includes what combination types of antiretroviral drugs?
Triple therapy 2 nucleoside reverse transcriptase inhibitors and ONE of the following; - Boosted protease inhibitor - Non-nucleoside reverse transcriptase inhibitor - Integrase inhibitor
212
What is used for HIV pre-exposure prophylaxis?
Emtricitabine with tenofovir
213
Why are some HIV medicines used in combination with cobicistat?
It is a pharmacokinetic enhancer that boosts the concentrations of other antiretrovirals, but it has no antiretroviral activity itself.
214
Name the nucleoside reverse transciptase inhibitors for HIV
``` Zidovudine Abacavir Didanosine Emtricitabine Lamivudine Stavudine Tenofovir disoproxil. ```
215
Name the protease inhibitors used for HIV
``` Atazanavir Darunavir Fosamprenavir Ritonavir Saquinavir Tipranavir ``` *Metabolised by cytochrome P450 enzyme systems*
216
Name the integrase inhibitors used for HIV
Dolutegravir, elvitegravir and raltegravir
217
Name the non-nucleoside reverse transcriptase inhibitors used for HIV
Efavirenz, etravirine, nevirapine, and rilpivirine
218
What is Maraviroc?
Antagonist of the CCR5 chemokine receptor. It is licensed for patients exclusively infected with CCR5-tropic HIV.
219
What has been reported in patients with advanced HIV disease or following long-term exposure to antiretroviral treatment?
Osteonecrosis
220
What is the MHRA advice regarding preparations containing dolutegravir (integrase inhibitor used for HIV)?
Increased risk of neural tube defects; do not prescribe to women seeking to become pregnant; exclude pregnancy before initiation and advise use of effective contraception
221
What CNS effects can efavirenz cause and how can this be reduced?
Depression, psychosis, confusion, hallucination, abnormal behaviour, suicidal ideations Take the dose at bedtime, especially during the first 2-4 weeks of treatment
222
What reaction can occur with HIV medicines?
Hypersensitivity e.g. Rash, lesions, oedema, SOB
223
Which HIV medicine is associated with a high incidence of rash including Stevens-Johnson syndrome?
Nevirapine
224
What is the important information that requires patient counselling for patients on nevirapine for HIV?
- Hepatotoxicity can occur so patients need to be made aware of symptoms - Rash, hypersensitivity reaction
225
Efavirenz for HIV is associated with an increase in plasma concentration of what substance?
Cholesterol
226
What are the long term effects of HIV treatment?
1.Immune reconstitution syndrome: as the immune system stands up on its feet again due to antiretroviral treatment, marked inflammatory reactions happen against opportunistic organisms 2. Lipodystrophy syndrome: this is made up of insulin resistance, fat redistribution and dyslipidaemia Blood lipids and sugars should be measured before, 3-6 months after and yearly after HIV treatment. 3. Osteonecrosis: following long-term exposure to treatment.
227
Protease inhibitors are mainly associated with what side effects?
Lipodystrophy and metabolic effects.
228
What can be used for the treatment of influenza and within how many hours of symptom onset should it be started?
Oseltamivir (Tamiflu) first line and zanamivir is reserved for those who are immunocompromised or when oseltamivir cannot be used Within 48 hours
229
What can be used for post-exposure prophylaxis of influenza and within how many hours of exposure?
Oseltamivir (Tamiflu) within 48 hours of exposure and zanamivir within 36 hours of exposure
230
How long should influenza treatment be for?
Twice daily dosing for 5 days
231
How long should post-exposure prophylaxis for influenza be for?
Once daily dosing for 10 days
232
What is a particular caution with co-amoxiclav in in terms of side effects?
Cholestatic jaundice can occur either during or shortly after the use of co-amoxiclav.
233
What is a rare but potentially fatal side effect of ketoconazole?
Associated with fatal hepatotoxicity. The CSM advise that prescribers should weigh the potential benefits of ketoconazole treatment against the risk of liver damage and should carefully monitor patients both clinically and biochemically.
234
What penicillin based antibiotics must you take on an empty stomach (1 hour before food or 2 hours after food)?
Flucloxacillin Ampicillin Penicillin V
235
What shouldn't a patient take at the same time as tetracycline antibiotics?
Do not take milk, indigestion remedies, or medicines containing iron or zinc at the same time of day as this medicine (prevents absorption of the antibiotic and should be taken 2-3 hours apart) Oxytetracycline and tetracycline should be taken on an empty stomach
236
Which tetracycyline antibiotics should be taken on an empty stomach?
Oxytetracycline and tetracycyline
237
What is the patient advice surrounding trimethoprim?
On long-term treatment, patients and their carers should be told how to recognise signs of blood disorders and advised to seek immediate medical attention if symptoms such as fever, sore throat, rash, mouth ulcers, purpura, bruising or bleeding develop.
238
True or false: | Rifampicin should be taken on an empty stomach
True
239
True or false: | Metronidazole should be taken on an empty stomach
False Take with or just after food
240
What shouldn't a patient take at the same time as ciprofloxacin?
Do not take milk, indigestion remedies, or medicines containing iron or zinc at the same time of day as this medicine.
241
What specific monitoring should you do with daptomycin?
Creatine kinase twice a week
242
What is the CHMP advice regarding the use of oral ketoconazole to treat fungal infections?
Marketing authorisation for oral ketoconazole to treat fungal infections should be suspended. The CHMP concluded that the risk of hepatotoxicity associated with oral ketoconazole is greater than the benefit in treating fungal infection People with a prescription for oral ketoconazole should be referred back to their doctors
243
How does calcium carbonate interact with doxycycline? What do you recommend the patient does if the patient is normally on calcium carbonate e.g. Adcal and is prescribed doxycycline?
Calcium carbonate is predicted to decrease the absorption of doxycycline Separate administration by 2-3 hours
244
What CD4 count is classed as AIDs?
<200
245
Which of the following is active against pseudomonas: - Benpen - Flucloxacillin - Ampicillin - Piperacillin
Piperacillin (Pip taz)
246
Which antibacterial drug increases the risk of serotonin syndrome? Linezolid Vancomycin Telvancin Septrin
Linezolid as it is a weak MAOI ``` Serotonin syndrome risk increases with: SSRIs TCAs Macrolides Amiodarone Fluoroquinolones Antipsychotics Quinine ``` Risk of hypertensive crisis
247
``` Which drug class is most associated with lipodystrophy? Antiretroviral drugs Alkylating agents TCAs ARBs ```
Antiretroviral drugs can cause redistribution of fat around the body
248
Quinine can be very toxic - what are the signs of toxicity?
Life-threatening features include arrhythmias (which can have a very rapid onset) and convulsions (which can be intractable).
249
What are adverse effects of quinine?
``` Tinnitus Deafness Blindness QT prolongation Hypoglycaemia GI upset Hypersensitivity reactions ```
250
What advice should you give to a patient on metronidazole regarding their urine?
May darken urine (brown)
251
Which of these is used to boost the effects of protease inhibitors? Elvitegravir Maraviroc Ritonavir Etravirine
Ritonavir - it is a protease inhibitor itself but it inhibits CYP enzymes that would otherwise metabolise other protease inhibitors
252
What are the side effects of trimethoprim?
``` Megaloblastic anaemia GI effects Taste disturbance Elevated creatinine levels Skin rash Hyperkalaemia ```
253
Trimethoprim can cause high levels of what electrolyte?
Potassium
254
What is the advice surrounding ribavirin and contraception?
Effective contraception essential during treatment and for 4 months after treatment in females and for 7 months after treatment in males of childbearing age.
255
What is the standard dose of oseltamivir in: i) Treatment of flu ii) Prevention of flu
i) 75mg BD for 5 days for treatment | ii) 75mg OD for 10 days for prophylaxis
256
Is vancomycin good for treating gram negative or positive organisms?
Gram positive
257
Is teicoplanin good for treating gram negative or positive organisms?
Gram positive
258
Allopurinol and what antibiotic can result in a skin rash?
Amoxicillin
259
True or false: NSAIDs and fluoroquinolones together increase seizure risk
True
260
Can macrolides cause QT prolongation?
Yes
261
What tetracyclines can you take with milk?
Does Like Milk acronym Doxycline Lymecycline Minocycline
262
What is 1st line treatment for chlamydia (both the patient and partner)? If this is not suitable, what regimes can be used instead?
Doxycycline 100 mg BD for 7 days Alternatives: Azithromycin 1 g orally for one day, then 500mg orally once daily for two days Erythromycin 500 mg BD for 10–14 days
263
How you manage a pregnant lady with chlamydia?
Azithromycin 1 g orally for one day, then 500mg orally once daily for two days Erythromycin 500 mg BD for 10–14 days
264
If a patient is thought to have chlamydia and presents in a primary care setting, where should you refer to?
GUM clinic
265
When should you do an STI screen in a patient with chlamydia?
1 week after completing treatment
266
If a patient and their partner are being treated for chlamydia, how long should they abstain from sexual intercourse? With what antibiotic is this different?
Until they have both finished treatment With azithromycin, you need to wait 7 days after
267
Does a partner of someone of chlamydia need to be treated if their screen result is negative?
Yes
268
How many weeks after the start of treatment do you do a test of cure treatment for chlamydia?
5 weeks
269
What age should you offer repeat testing of chlamydia in 3-6 months after treatment?
<25 years
270
What can a high ESR indicate?
Inflammation, infection
271
Is ESR usually low or raised in infection?
Raised
272
Why aren't quinolones e.g. ciprofloxacin, ofloxacin generally used in children?
Quinolones cause arthropathy and therefore are not recommended in children and growing adolescents.
273
What is the cut off eGFR for nitrofurantoin?
45
274
Can you use tetracyclines in renal impairment?
No - should not be given at all in renal impairment | Apart from doxycycline and minocycline (but these should be used with caution)
275
Can tetracyclines cause hepatotoxicity?
Yes
276
True or false: | Tetracyclines can be used during pregnancy
False
277
True or false: | Trimethoprim can be used during pregnancy
False - teratogenic in first trimester
278
True or false: | Nitrofurantoin can be used during pregnancy
True | But avoid at term
279
Can metronidazole be used during pregnancy?
No | Only use if benefit outweighs risk
280
Is Ben Pen active against streptococci?
Yes
281
Is linezolid active against MRSA?
Yes
282
Can chloramphenicol be used in pregnancy?
No
283
Should metronidazole be taken with or without food?
With or just after food
284
What electrolyte disturbances can be caused by aminoglycosides?
Hypokalaemia Hypo Mg Hypo Ca
285
What is the MHRA warning about gentamicin?
Potential for histamine-related adverse drug reactions with some batches
286
Is gentamicin used for MRSA?
No
287
Red man syndrome caused by vancomycin causes is associated with what other clinical features?
Hypotension Bronchospasms Caused by rapid infusion
288
Which is associated with a higher incidence of nephrotoxicity? Teicoplanin Vancomycin
Vancomycin
289
If a patient on a tetracycline develops a headache, what should they do?
Stop | Side effect of tetracyclines- benign intracranial hypertension
290
What tetracyclines should you avoid milk in? (DOT)
Demeclocycline Oxytetracycline Tetracycline
291
What tetracyclines can you have milk with? (DLM)
Doxycycline Lymecycline Minocycline
292
What tetracyclines cause oesophageal irritation and is recommended to take with plenty of fluid?
Doxycycline Minocycline Tetracycline
293
Can ciprofloxacin cause QT prolongation?
Yes
294
Are quinolones active against MRSA?
No
295
If a patient on a quinolone develops psychiatric disturbances, what should you recommend?
They should stop the drug
296
What is the interaction between ciprofloxacin and theophylline?
Ciprofloxacin is an enzyme inhibitor and causes theophylline toxicity - convulsions risk
297
Which quinolone should you protect yourself from sunlight if on it?
Ofloxacin
298
Cholestatic jaundice risk is increased with amoxicillin/flucloxacillin if on it for more than how many days?
14 days
299
What is the dosing regimen for Malarone for the prophylaxis of malaria?
1 tablet OD, started 1-2 days before, during, and 7 days after Take with food/milky drink
300
Should Malarone be taken on an empty stomach or with food?
Take with food/milky drink to maximise absorption
301
What is the renal cut off for Malarone?
<30 mL/min
302
What is the dosing regimen for doxycycline for the prophylaxis of malaria?
1 tablet OD, started 1-2 days before, during, and 4 weeks after
303
How long do you continue malaria prophylaxis with doxycycline after leaving the area of risk?
4 weeks after
304
What is the dosing regimen for chloroquine in the prophylaxis of malaria?
2 tablets once a week Start 1 week before, during and 4 weeks after Take just after food
305
Should chloroquine be taken on an empty stomach?
No | Take just after food
306
Should proguanil be taken on an empty stomach?
No | Take just after food
307
What is the dosing regimen for proguanil in the prophylaxis of malaria?
2 tablets OD Started 1 week before Continue for 4 weeks after Take just after food
308
Should mefloquine be taken on an empty stomach?
No | Take just after food
309
What are the side effects associated with glycopeptides?
- Nephrotoxicity - Ototoxicity - Red man syndrome - associated with too rapid infusions and other symptoms are hypotension and bronchospasms - Phlebitis - rotate infusion sites - Neutropenia - Steven Johnsons
310
What is the dose of trimethoprim for a UTI?
200mg BD
311
What is the safest macrolide to use in pregnancy?
Erythromycin
312
What is penicillin G?
Benzylpenicillin
313
What is first line for acute infective exacerbation of COPD and how long for?
Amoxicilin, clarithromycin or doxycycline for 5 days
314
What is first line for acute exacerbation of bronchietasis and how long for?
Amoxicilin, clarithromycin or doxycycline for 7-14 days
315
What is low severity CAP in terms of CURB score?
0-1
316
What is moderate severity CAP in terms of CURB score?
2
317
What is high severity CAP in terms of CURB score?
3-5
318
What is the CURB score and what does each marker mean?
``` Confusion - mental test 8 or less Urea > 7 mmol/L Resp rate 30 breaths/min or more Blood pressure systolic < 90 or diastolic 60 or less 65 years and older ``` 1 point for each Low risk 0-1 Moderate 2 High risk 3-5
319
What is the dose of nitrofurantoin for a UTI?
50mg QDS
320
When would you add flucloxacillin to pneumonia treatment?
If staphylococcus is suspected
321
How would you manage someone with mild facial cellulitis? | What if the patient was penicillin allergic?
Co-amoxiclav Clarithromycin for people with a penicillin allergy
322
How do you treat Scarlet fever?
Pen V
323
How long should you abstain from alcohol after a metronidazole course?
48 hours
324
Within what time should you notify PHE of a patient with a notifiable disease? What about if it is urgent?
Send the form to the proper officer within 3 days, or notify them verbally within 24 hours if the case is urgent by phone, letter, encrypted email or secure fax machine.
325
What are the treatment options for recurrent thrush?
Initially: 3 doses of 150mg fluconazole ( 3 days apart) or intravaginal antifungal for 10-14 days After: Maintenance of 6 months or oral fluconazole 150mg weekly or intravaginal clotrimazole 500mg weekly
326
What are the treatment options for recurrent UTIs if trigger is not known and if trigger is known?
Manage acute UTI first Then, i) If trigger is known, 1st choice is trimethoprim 200mg single dose after trigger exposure Nitrofurantoin 100mg single dose after trigger exposure Alternatives- amoxicillin 500mg or cefalexin 500mg ii) If trigger is NOT known, 1st choice trimethoprim 100mg ON Nitrofurantoin 50-100mg ON Alternatives: Amoxicillin 250mg ON or cefalexin 125mg ON

BNF (21 decks)

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