Notes Flashcards
How much K does a patient need in a day?
1 mmol / kg / day
What does the rate of infusion of K cannot exceed?
> 10 mmol / hr
Max dose of paracetomal in a day
1g QDS
What do enzyme inducers do?
Increase the metabolism of drugs thus leading to a decreased effect
Enzyme inducers
Phenytoin Carbamazepine Barbituates Rifampicin Chronic alcohol excess Sulphonyureas St Johns wort Smoking Topiramate
What do enzyme inhibitors do?
Increase metabolism of drugs and therefore more of the drug in the body
Enzyme inhibitors
Allopurinol Omeprazole Disulfiram Ciprofloxacin Acute alcohol excess Sulphonamines Grapefruit juice Amoidarone SSRIs
How much can transaminases be raised before statins have to be discontinued?
3x the upper limit of normal
Examples of drugs prescribed in micrograms
Digoxin
Levothyroxine
Paracetomal and what drug together often mean too much of the drug?
Co-codamol
What does 1% mean?
1g in 100ml
Prescribed name as tazocin
Piperacillin with tazobactam
How long before surgery does the COCP have to be stopped?
4 weeks before
How long before the surgery does lithium have to be stopped?
1 day
How long before surgery should potassium sparing diuretics and ACEIs be stopped?
Day of
How long before surgery should anticoagulants be stopped?
7 days
Examples of anticoagulants
Warfarin
Heparin
Examples of antiplatelets
Aspirin
Clopidogrel
Dipyramidole
Should metformin be stopped before surgery?
Yes, as NBM -> lactic acidosis
What should be done to insulin when having surgery?
A sliding scale should be started
What should be stopped if a patient is bleeding?
Any antiplatelets etc or prophylactic anticoagulation
What do ACEIs contribute to?
Renal failure
How many hourly is 3x daily?
8 hourly
How many hourly is 4x daily?
6 hourly
Does co amoxiclav contain penicillin?
Yes
Does amoxicillin contain penicillin?
Yes
Does tazocin contain penicillin?
Yes
What is a specific condition that prophylactic heparin is contraindicated in?
Acute ischemic stroke (as risk of bleeding into the stroke)
What would an enzyme inhibitor e.g. erythromycin do to INR?
Increase warfarins effect i.e. Increase INR
S/Es steriods
Stomach ulcers Thin skin Confusion Oedema Right and left HF Osteoporosis Infection (including candida) Hyperglycaemia Cushings
What are NSAIDs contraindicated in?
Heart failure
Renal failure
Asthma
S/Es NSAIDs
Renal failure Systolic dysfunction Indigestion Clotting abnormalities Ulceration
S/Es antihypertensives
Hypotension
S/Es BBs
Bradycardia
Wheeze in asthmatics
Worsening of acute HF
S/Es of CCBs
Bradycardia
Peripheral oedema
Flushing
S/Es of loop diuretics
Renal failure
Hypokalaemia
Gout
S/Es K+ sparing diuretics
Hyperkalaemia
Gynaecomastia
S/Es TTD
Hypokalaemia
S/Es ACEIs
Hyperkalaemia
Dry cough
S/Es ARBs
Hyperkalaemia
If a patient is vomiting, how should antiemetics be given?
Non oral routes i.e. IM/IV/SC
Should a patient who is NBM still receive their medication?
Yes
As a general rule, never prescribe more than how many Litres of fluid for a sick patient?
2 litres
How much fluid does a patient need for maintenance fluids as a general rule?
3L adult per 24 hrs
2L elderly per 24 hrs
What is a saying for maintenance fluids in 24 hours?
2 sweet and 1 salt
- 2L 5% dextrose
- 1L 0.9% saline
Rough amount of K needed in an adult per day
40 mmol
So if giving 3 litres per day for maintenance, how many bags do you need to give over what time?
3x 1L bags 8 hourly
So if giving 2 Litres per day for maintenance, how many bags do you need to give over what time?
2x 1L bags 12 hourly
What is the prophylactic DVT dose for LMWH?
5000 units dalteparin OD S/C
When should a patient not wear compression stockings in DVT prophylaxis?
Peripheral artery disease as may cause acute limb ischaemia
What can cyclizine cause?
Peripheral oedema
Who should metaclopramide be avoided in?
PD (exacerbates symptoms) Young women (risk of dyskinesia) Bowel obstruction
Pain relief prescription for someone in no pain
No regular painkillers
PRN paracetomal 1g up to 6 hourly oral
Pain relief prescription for someone in mild pain
Regular paracetomal QDS 1g
As required codeine 30mg up to 6 hrs or tramadol
Pain relief prescription for someone in severe pain
Regular co codamol 30/500 2 tablets 6 hourly
As required morphine sulphate 10mg up to 6 hourly oral
What is oromorph and what is the dose?
Liquid morphine sulphate
10mg/5ml
What is the maximum dose of ibruprofen?
400 mg 8 hrly
1st line Tx for neuropathic pain
Amitriptyline 10mg oral at night OR
Pregabalin 75 mg oral BD
Treatment of painful diabetic neuropathy
Duloxetine 60 mg oral OD
What does co codamol contain?
30mg codeine
500mg paracetomal
What is the antiemetic of choice in parkinsons disease and why?
Domperidone
Does not cross the BBB
What kind of drugs are metoclopramide and domperidone?
Anti sickness - dopamine antagonists
What kind of drug is cyclizine?
Anti-histamine anti-emetic
If a patient is constipated, what drugs should be withheld?
All opiate derived drugs
What is trimethoprim contraindicated with?
Methotrexate
Why is trimethoprim contraindicated with methotrexate?
Risk of bone marrow toxicity - leading to pancytopenia and neutropenic sepsis
All diuretics can cause what?
Hyponatraemia
However when they contribute to dehydration then can get hypernatremia too
How long should patients who have suffered from acute strokes NOT take thromboprophylaxis for?
2 months (duration varies)
What is INR?
Standardized version of prothrombin time
What are the PT and INR a measure of?
Overall clotting factor synthesis or consumption
Normal INR
1
What does a high INR mean?
Higher risk of bleeding
Target INR on warfarin
2 - 3
Should patients already on warfarin be put on thromboprophylaxis?
No
What should CCBs be not used with and why?
Beta blockers
Due to risk of bradycardia (at worst asystole) and hypotension
Cardioprotective aspirin dose
75 mg
Treatment dose aspirin
300 mg
Give an example of something the COCP is contraindicated with
Migraine with aura (increased risk of stroke)
What type of insulin is novomix?
Short and medium term insulins
What route is all insulin?
Subcut (except for sliding scale insulins = infusion)
S/E clozapine
agranulocytosis - resulting in neutropenia
K+ monitoring when treating DKA
When insulin is given, the K+ drops requiring regular (hourly) monitoring +/- replacement
What does a raised urea indicate?
Upper GI bleed
AKI/dry
What to look at is there is a raised urea with a normal creatinine in someone who is euvolaemic?
Hb
How is the synthetic function of the liver assessed?
Albumin
PT/INR
Isolated bilirubin rise means what?
Haemolysis
Drugs causing hepatitis
Paracetomal
Statins
Rifampicin
Drugs causing cholestasis
Flucloxacillin Co amoxiclav Nitrofurnatoin Steriods Sulphonyureas
Common drugs requiring monitoring
Digoxin Theophylline Lithium Phenytoin Gentamicin Vancomycin
Presentation of digoxin toxicity
Confusion
Nausea
Visual halos
Arrythmias
Presentation of lithium toxicity
Tremor Fatigue Arrythmias Seizures Coma Renal failure Diabetes insipidus
Presentation of phenytoin toxicity
Gym hyperplasia Ataxia Nystagmus Peripheral neuropathy Teratogenicity
Presentation of gentamicin toxicity
Ototoxicity
Nephrotoxicity
Presentation of vancomycin toxicity
Ototoxicity
Nephrotoxicity
What happens on a gent chart when the concentration lies above the 48 hour line?
Repeat the gentamicin level and only redose when the conc. < 1 mg/L
Treatment of paracetomal overdose
At least 4 hours after ingestion -> if the paracetomal level is below the line, the patient DOES NOT require NAC
If staggered overdose was taken or time of ingestion is unknown, treatment with NAC is advised
Target INR if on warfarin with recurrent TE or metal replacement heart valves
3.5
What to do if a patient has a major bleed and a patient is on warfarin?
- Stop warfarin
- Give 5 - 10 mg IV Vitamin K
- Give prothrombin complex (e.g. beriplex)
How to manage warfarin is INR <6
Reduce warfarin dose
How to manage warfarin if INR 6 - 8
Omit warfarin for 2 days then reduce dose
How to manage warfarin if INR > 8
Omit warfarin and give 1 - 5 mg oral vit K
Treatment of neutropenic sepsis
IV tazocin (piperacillin with tazobactam) + gentamicin
S/E carbamazepine
Hyponatraemia (through SiADH)
What is the adequate choice to treat a seizure lasting longer than 5 minutes?
Lorazepam
If a patient has addisons disease and becomes unwell, what must be done?
Increase steriod dose
What does right sided heart failure result in?
Peripheral oedema and raised JVP
What does left sided heart failure result in?
Bilateral creps and SOB
What is the mainstay of treatment in acute heart failure?
Furosemide
What is bumetanide and what is it used for?
A loop diuretic reserved for patients resistance to furosemide
Tx AF if rate < 100 bpm
Not termed fast AF and does NOT require rate control
When is DC Cardioversion not required in the acute setting of AF?
Abscence of adverse features e.g. chest pain, heart failure, hypotension/syncope
Tx PE
Treatment dose LMWH
What are the LMWH?
Enoxaparin
Dalteparin
Tineaparin
Regular morphine vs PRN morphine dose
1/6 of total daily dose given 4 - 6 hourly
If a patient with chronic pain is requiring higher doses of PRN, what does this mean?
The regular dose requires adjustment
Tx STEMI
02 Aspirin 300mg Morphine 5-10mg IV Metoclopramide 10mg IV GTN PCI or thrombolysis BB (unless CId)
Tx NSTEMI
All the same as STEMI except instead of PCI, clopidogrel 300mg oral + enoxaparin 1mg/kg S/C
Tx acute HF
O2 Sit patient up Morphine and metoclopramide GTN Furosemide 40 - 80mg If no response -> isosorbide dinitrate infusion +/- CPAP
Tx of MI in shockable rhythm
- Synchronised DC shock up to 3x
- Amoidarone 300mg IV over 10 - 20 mins + repeat shock
- Amoidarone 900mg over 24 hrs
What is an irregular narrow complex tachycardia probably?
AF
Tx polymorphic VT (torsades de pointes)
2mg Mg over 10 mins
Tx SVT
Adenosine
Tx anaphylaxis
O2 Adrenaline 500mg of 1:1000 IM Repeat if no effect IV adrenaline Chlorphenamine 10mg IV Hydrocortisone 200mg IV
Tx acute asthma
02 Salbutamol 5mg Neb Hydrocortisone 100mg IV or prednisolone 40 - 50 mg oral Ipratropium 500mcg neb Theophylline
Oxygen in acute COPD
28% O2 safe starter then ABG 30 mins later
Tx suspected bacterial meningitis in primary care
1.2g BenPen IM
Tx suspected bacterial meningitis in secondary care
02 Fluids IV dexamethasone LP +/- CT head 2g ceftoaxmine IV
Tx seizure
Lorazepam 2 - 4mg IV or diazepam IV or midazolam buccal
Repeat if still fitting after 2 mins
Phenytoin infusion
Intubate then propofol
Tx Stroke
If CT shows haemorrhage DO NOT GIVE thrombolysis or aspirin
If < 80 + onset < 4 - 5 hours = thrombolysis
Aspirin 300 mg oral
Tx hyperglycaemia
IV fluids; stat then over 1 hour then 2, 4 + 8 hours
Sliding scale insulin
HONK vs DKA Tx
Same Tx however in HONK 1/2 the rate of fluids
Tx opoiod toxicity
Naloxone
Tx benzos overdose
Flumazenil
Tx Chronic heart failure
ACEI BB If isnt working add - ARB - hydralazine and IMN - spironolactone
Tx HTN < 55
ACEI
Tx HTN > 55
CCB
Tx HTN black people
CCB
CHADSVASC Score and Tx
0 = aspirin 75mg
1 = either aspirin or warfarin (INR aim 2.5)
2 or more = warfarin (INR aim 2.5)
Rate control AF
- Beta blocker or diltiazem
2. Digoxin
Cardioversion AF
Electrical
Pharmacological (amoidarone 5mg/kg IV over 20 - 120 min)
Will require anticoagulation if > 48 hours onset
Tx Angina
GTN PRN
2ndry prevention
BB or CCB
Tx Asthma
SABA ICS LABA LTRA / theophylline Oral steriods
Tx smoking cessation
Nicotine replacement therapy
Bupropion
Varenciline
Tx T2DM
Metformin
Gliclazide
Sitagliptin
Insulin
Tx COPD
SAMA or SABA PRN
LABA or LAMA (stop SAMA)
LABA + LAMA + ICS
Tx PD
Co-benledopa or co-carledopa
Mild / younger
- ropinirole (dopamine agonist)
- rasagiline (MOA-inhibitor)
Tx generalised epilepsy
Sodium valproate
Tx absence seizures
Sodium valproate or ethosuximide
Tx myoclonic seizures
Sodium valproate
Tx tonic seizures
Sodium valproate
Tx focal seziures
Carbamazepine or lamotrigine
S/E lamotrigine
SJS/rash
S/E carbamazepine
Rash Dysarthria Ataxia SIADH Nystagmus Hyponatraemia
S/E phenytoin
Gym hyperplasia
Ataxia
Peripheral neuropathy
Hepatotoxicity
S.E valproate
Tremor
Teratogenicity
Weight gain
Tx Alzheimers
Mild/moderate - Ach inhibitors - donepezil - Rivastigmine - galantamine Mod - severe NMDA antagonist - memantine
Tx CD (inducing remission)
Mild flare 30 mg prednisolone oral
severe flare 100mg hydrocortisone QDS and can use rectal if rectal involvement
Maintaining remission of CD
Azathioprine or 6-metcaptopurine
Tx RA (maintaining remission)
- Methotrexate and DMARD (e.g. sulphazalaine or hydroxychloroquine)
- Biologic Tx
Tx flare RA
Short term steriods
NSAIDs
What has to be checked before starting azathioprine?
TMPT level
Tx pyrexia
Paracetomal
If there is evidence of obstruction, what should not be given?
Metoclopramide
Laxatives
Tx chronic diarrhoea
Loperamide 2mg oral up to 3 hourly
Codeine 30mg oral 6 hourly
Tx insomnia
Zopiclone 7.5 mg (3.75 mg elderly)
What is the stool softener laxative and what is it good for?
Docusate
Good for faecal impaction
What is the stimulant laxative and what may it worsen?
Senna
Cramps
What are the osmotic laxatives and what may they exacerbate?
Phosphate enema
Lactulose
May exacerbate bloating
What contraindicated in the acute abdomen?
Laxatives
What infections is metronidazole good for and why?
GI infections
Because of its good effects on anaerobes which colonise the gut
1st line antibiotic for skin infections
Flucloxacillin
S/Es antimuscarinic drugs
Dry mouth
Constipation
Visual disturbance
Tx vit B12 deficiency
Hydroxocobalamin
Examples of drugs that can precipitate parkinsonian symptoms even in patients without PD
Metoclopramide
Haloperidol
What is the anti emetic of choice in PD and why?
Domperidone
Does not cross the BBB
What does the treatment dose of dalteparin depend on?
Weight
Is ramipiril teratogenic and when?
Yes, 1st trimester
S/Es tamoxifen
Increased risk of endometrial cancer
Increased efficacy of warfarin leading to increased INR
Increased risk of DVT
S/E metformin
Lactic acidosis
S/E sulphonyureas
Hypos
How often is methotrexate taken?
Weekly
What can ACEIs do in the elderly?
Increases risk of AKI if unwell
How long can SSRIs take to work?
Up to 6 weeks
What is serotonin syndrome and what is the Px?
Life threatning complication of SSRIs
Agitation, fever, hallucinations
HbA1c aim in diabetic pts
48
How many months is HbA1c over?
3 months
When unwell, how do you adjust the dose of insulin?
When unwell your blood glucose increases and therefore your dose of insulin required also increases. However, if oral intake decreases if you are unwell, insulin may also need to be decreased
How should biphosphonates be taken?
With a full glass of water
Remain upright for 30 mins after
How often are bisphosphonates taken?
Weekly
Food and alendronic acid
Food should be avoided 2 hours after alendronic acid as it decreases absorption
1% = ?
1 g in 100ml
1 g = ? mg
1000 mg (3 DPs)
1 g = ? mcg
1000,000 (6DPs)
Gent and low egfr
Egfr < 20 - high doses of gentamicin are not recommended
On a gentamicin chart if the point falls on the boundary line between the two intervals, what dosing interval should be chosen?
Longer dosing interval
If a patient in the scenario has pain, make sure they have what prescribed?
Regular painkillers as well as PRN
When should ACEIs be given and why?
At night
Cause postural hypotension
Tx Hyperkalaemia
- Short acting insulin (e.g. 10 units actarapid) in 100ml of 20% dextrose over 30 min IV
- Salbutamol 2.5 - 5mg stat
- Calcium resonium (takes few days to work)
- Dialysis
Calcium gluconate stabilizes cardiac membrane
What is the safest anti-epileptic in pregnancy?
Lamotrigine
What hyperglycemic medication should not be used when renal impairemnt?
Metformin
Monitoring requirements statin
Creatinine kinase level at baseline
LFTs (3 + 12 months)
What scenarios are statins contraindicated in?
Active liver disease
Serum transaminases > 3x normal
Monitoring requirements phenytoin
Trough level taken on day 14
If no seizures (i.e. a therapeutic level of the dose) - then the dose dosent need increased
If S/Es despite a normal trough level then decrease the dose if seizure control adequate
Serum concs of lithium > ? are likely to manifest with toxic effects
1.5 mmol / L
Sampling time for lithium
12 hours after last dose
Are FBCs routinely done for patients on lithium?
No
Lithium monitoring requirmenets
Weekly
Then after each dose change
Every 3 months thereafter
Lithium and diet
Patients advised to avoid making changes to their diet as increased Na in their diet can increase the risk of lithium toxicity
Methotrexate and LFTs
Should not be started if LFTs are abnormal as there is a risk of cirrhosis
Monitoring methotrexate
FBC one stable every 2 - 3 months
Renal function
LFTs
How is methotrexate predominately excreted?
Renally
Monitoring requirements olanzapine
Fasting BMs at baseline and regular intervals -> hyperglycaemia and DM can occur
Pts starting on an antipsychotic - who needs an ECG?
Patients with CVS disease or assosiated RFs
Monitoring requirements OCP
BP
What is needed when starting amoidarone and why?
CXR
Risk of pulmonary toxicity
Monitoring requirements amoidarone
Baseline CXR
T4 T3 + TSH
Serum transaminase
K+ (hypokalaemia caution)
What should patients be advised of when starting carbimazole and why?
Sore throat
Carbimazole induced bone marrow suppression and agranulocytosis
FBC and neutrophil count required
What should be checked for a multiple daily dose regimen of gentamicin?
Both pre and post dose levels at regular intervals
Monitoring requirements ACEIs
U + Es at baseline and after every dose change
When do you measure plasma digoxin concentration?
Not unless toxicity, non compliance or inadequate effect
How is digoxin predominatelty excreted?
Renally excreted and pts at risk of renal dysfunction have increased risk of toxicity
Monitoring of valproate
LFTs at baseline and regular intervals
Does valproate cause renal toxicity?
NO
Monitoring clozapine
FBC checked for first 18 weeks then more spaced out intervals
Monitoring warfarin
INR daily / alternative days at start then longer intervals then every 12 weeks
What should be fixed before starting a bisphosphonate and what should be monitored during?
Ca + vit D
When starting warfarin, what can be prescribed alongside to stablilise the dose and why?
Heparin
As it has a pro coagulant effect initially
S/E aspirin
PUD
Gastritis
Tinintus
Haemorrhage
S/E digoxin
Nausea and vomiting Diarrhoea Blurred vision Confusion Drowsiness Xanthopsia
S/E Amoidarone
Pulmonary fibrosis
Thyroid disease
Skin greying
Corneal deposit
S/E lithium
Tremor Tiredness Arrythmias Seizures Coma Renal failure Diabetes insipidus
S/E haloperidol
Dyskinesias
S/E fludrocortisone
HTN / Na + H20 retention
S/E statins
Myalgia
Abdominal pain
LFTs abnormal
Rhabdomyolysis
Drugs with a narrow therapeutic index
Warfarin
Digoxin
Phenytoin
Drugs which require careful dosage control
Anti HTNs
Anti diabetic drugs
Acute alcohol effect on warfarin
Increases its effects
Chronic alcohol effect on warfarin
Decreases its effects
What should NSAIDs not be co prescribed with, especially in the elderly who already have a history of renal impairment?
ACEIs
What is the brand name for co amoxiclav?
Augmentin
What reverses the effects of heparin?
Protamine
Tx hypoglycaemia
If conscious - sugar rich snack
If unconscious/cant swallow - IV 20% glucose (or 10%) over 15 - 20 mins
Glucagon
S/Es opiods
Constipation
Resp depression
Drowsiness
What is lithium excretion significantly decreased by?
ACEIs
Diuretics
NSAIDs
What titration increments should thyroxine be done in?
25 - 50 mcg doses
What may happen to patients when recovering from renal failure?
May enter a ‘polyuric phase’ in which their urine output increases and fluid input may not be in keeping of this pace
What should never happen to anti epileptic drugs?
Should never be stopped abruptly unless patient is toxic and in the hospital where emergency treatment of seizures can be instigated
How much maintenance fluids does an adult generally require per day?
3 litres (8 hourly)
How much maintenance fluids does an elderly person generally require per day?
2 litres (12 hourly)
How much K does a patient require in a day if NBM?
40 - 60 mmol
What odd S/E can BB have?
Fatigue
Erectile dysfunction
Tx of acute manifestation of COPD
Salbutamol
Ipratropium bromide
What types of NIV exist?
BPAP
CPAP
What resp failure requires CPAP?
Type 1
What resp failure requires BPAP?
Type 2
In a diabetic patient, what can excessive alcohol lead to?
Life threatning hypoglycaemia
What are patients on steriods at risk of?
HTN
Statins should be stopped when taking what drug?
Clarithromycin
Tx immediate relief of dyspepsia
Magnesium carbonate
Aluminium hydroxide
Co-magaldrox
When should senna not be given?
If colitis or cramps
What is the beneficial monitoring of aminothyline done by?
O2 sats
How long can consolidation on a CXR due to pneumonia take to clear?
Up to 6 weeks
Monitoring tacrolimus
Trough level before the dose
What is an increased resp drive triggered by?
Hypoxia
Hypercapnia
How to assess response to DKA Tx?
Serum ketones
Serum glucose normalizes rapidly after commencing insulin sliding scale
What can the only presentation of renal impairment be?
Malaise
What does co-dydramol contain?
Dihydrocoedine
When can vit K be given by mouth?
If no active bleeding
When should diuretics not be given and why?
Shouldnt be given at night as will be up all night peeing
How often are metoclopramide and cyclzine given?
6 hourly
When should a patient have a blood transfusion?
< 70 g/L
< 100 in ischaemic heart disease
How long should oral iron replacement be given for?
Until Hb is in normal range and then for a further 3 months to replenish stores
Can dextrose be used for fluid resus?
No
Can you give 1L stat in resuscitation?
Yes
What is flecanide contraindicated in?
Structural heart disease
What is a serious complication of statins?
Myositis (presents as cramps)
What heart condition should ACEI be avoided in?
Aortic stenosis
First line treatment for acute otitis media
Amoxicillin
What drugs should be avoided in myasthenia gravis?
Antimuscarinics/anticholinergics
Treatment of epiglottitis
Cefotaxime
What is the mainstay of treatment of severe anxiety?
Benzodiazepines e.g. diazepam
If start on floxetine, what is a rare S/E to look for?
Rash
When should an efficacy assessement be done for depression treatment?
4 weeks after starting treatment
When is enoxaparin dose altered?
Low egfrs (< 30) Adults < 50kg
What drugs should be prescribed at a lower dose if an adult is < 50 kg?
Paracetomal
Enoxaparin
What is a common S/E of all heparins?
Hyperkalaemia
How long before surgery are antiplatelets stopped?
7 days
Are ARBs nephrotoxic?
Yes
What can allopurinol accumulate in?
Renal dysfunction
What can steriods cause particularly in the elderly?
Confusion
How do citalopram and other SSRIs cause hyponatraemia?
Through innapropriate ADH secretion
What is important general pain relief advice?
Same drug is used for regular and breakthrough pain relief
When should nitrofurantoin be avoided?
Pregnancy
eGFR < 45
What INR is needed for surgery?
1.5 or under
What should be done if the INR > 1.5 the day before surgery?
Vitamin K 1-5mg IV
What should rivaroxaban be taken with?
Food
1 nanogram = ? mcg
Move 3 DPs to get to mcg
What drug can cause cholestatic jaundice?
Co amoxiclav
Citalopram and gabigatran together cause what?
Increased risk of bleeding
When ACEIs are started, what should be expected?
A small rise in creatinine (<20%)
How is the treatment efficacy of furosemide mointored?
Weight reduction
How is the treatment efficacy of treatment of congestive heart failure moinotred?
Exercise tolerance
How much insulin should be added to manage a tranisent rise in BM caused by steriods?
Increase in usual insulin dose by 10%
Statins ideal effects after 3 months
> 40% reduction in non-HDL cholesterol
Treatment of acute dystonic reactions
Anti muscarinics 1st line
Benzodiazepines
Anti muscarinic drugs
TCAs
BBs
Ipratropium bromide
SSRIs
What condition are BB contraindicated in?
Asthma
Peripheral vascular disease
What drugs can worsen acute heart failure?
Corticosteriods
CCBs
Steriods and intercurrent illness
Steriods must be continued through intercurrent illness as they may have chronic adrenal suppression and therefore steriods should not be stopped abruptly
What may an increased dose of insulin in the evening lead to?
More hypos in the early morning
What happens when miss one COCP?
The patient can still be protected from pregnancy. They should take the missed pill and todays pill even if taking 2 pills in one day. Does not need extra contraception.
Methotrexate and conception
Both men and women should avoid conception while taking it and for 6 months after stopping it
Beneficial monitoring of antibiotic treatment
If symptoms resolve
Statins and muscular Cx
If muscular symptoms or CK elevated over 5x normal, then treatment should be discontinued
If symptoms resolve and CK returns to normal, then the statin should be reintroduced at a lower dose.
1st line Tx for HTN patients who have DM
Regardless of age / race - 1st line Tx is ACEI/ARB
When should simvastatin be used cautionally in renal impairment?
Used in caution if > 10 mg /day with an eGFR low
What should sertraline be used with caution in?
Renal impairment
What can diclofenac worsen and how?
Heart failure
It causes renal hypoperfusion which has deleterious effects on the heart function due to the release of vasoconstrictive mediators
1st line Tx HTN in pregnancy
Labetolol
Which anti emetic is of choice in a patient who is at risk of extrapyramidal S/Es and QT prolongation?
Cyclizine
What is recommended for initial fluid resuscitation?
Fluid bolus 500ml NaCl 0.9% or plasmalyte over 15 mins is recommended
S/Es ciclosporin
Hyperkalaemia
Nephrotoxicity
When looking for dosing errors, what is important to look at?
Check if the patient is elderly
What can all PPIs cause?
Loose stools and diarrhoea
What can alendronic acid cause?
Diarrhoea
What can naproxen cause?
Ankle oedema
Tx of thrush during pregnancy
Prolonged therapy required
Systemic therapy not recommended
Tx C diff
Metronidazole
Vancomycin - repeated infections / metronidazole no effect
Insulin changes in DKA
- Fluid resus
- Short acting insulin S/C should be STOPPED
- Long acting insulin should be CONTINUED
- Fixed rate IV insulin
What is the simplest Tx of acute pain in an elderly person?
Paracetomal
When should loperamide be taken?
After each loose stool
Dose of loperamide
2mg / dose
SSRIs + what can precipitate serotonin syndrome?
Serotonin inducing drugs (e.g. tramadol)
Tx of antipsychotic induced parkinsonism (particularly tremor)
Procyclidine hydrochloride (anti-cholinergic drugs)
What should be checked before starting azathioprine?
TPMT levels
What should patients starting treatment with apixaban be told to look out for?
Any bruising or signs of bleeding
Are fentanyl patches appropriate for acute pain?
No
What is the painkiller which is appropriate where strong analgesia is needed in the context of renal impairment? Why?
Oxycodone - it is metabolized by the liver
What can morphine cause?
Urinary retention
Max dose of loperamide in a day
16 mg
What can cyclizine exacerbate?
Heart failure
What is topiramate contraindicated with?
COCP
Tx alcohol withdrawal
Chlordiazepoxide hydrochloride
Why is BB contrainidcated in PVD?
It worsens ischemia
S/E of TTD
Hyponatraemia
What can prednisolone worsen?
Heart failure
S/E tacrolimus
Hyperkalaemia
What is the dosing of allopurinol?
300 mg PO OD
Reduced to 100 mg whilst renal function is poor
What can SSRIs cause an increase in?
Bleeding
Blood glucose and nicotine replacement therapy
Monitoring of BMs should be carried out when commencing nicotine replacement therapy. Especially if have diabetes as they may require less insulin or need to reduce the amount of nicotine replacement
What is the first choice treatment in a pt with confirmed DVT or PE?
Apixaban or rivoroxaban
LWMH if unsuitable
When should you not used maintenance fluids containing glucose?
After cerebral injury (excessive glucose containing fluids have the potential to exacerbate cerebral injury)
Who should statins be offered to?
Pts with CV risk > 10%
What is the starting dose of statins for primary prevention?
20mg
Who is metformin contraindicated in?
Pts with significant renal impairment
Who are acutely unwell
Tissue hypoxia likely
What is aspirin a cause of?
Iron deficiency anaemia
What does pioglitazone have the potential to cause?
Hypoglycaemia
Drugs that may cause urinary retention
Morphine and other opiod analgesics (esp in elderly post op period) Anticholinergics Anaesthetics A-adrenoceptor agonists Benzodiazepines NSAIDs CCBs Antihistamines Alcohol
Drugs that can cause confusion
Anticholinergics Opiods Benzodiazepines Metoclopramide Antipsychotics Antidepressants Anticonvulsants
Uncommon
- digoxin
- BB
- prednisolone
- NSAIDs
- Antibiotics
What is indicated in a patient with a long history of alcohol abuse and disorientation who may have or are at risk of wernickes encephalopathy?
IV vit B (pabrinex)
What is the insulin rate in DKA Tx?
Fixed rate insulin 0.1 units / kg / hr
What is recommended for the prevention of neural tube defects? When is it taken until?
Folic acid
- 5mg in high risk parents
- 400 mcg in lower risk parents
From conception until 12 weeks pregnancy
What does alendronic acid reduce?
Fractures
What is used for HRT in a women with an intact uterus?
Oestrogen is combined with progesterone which decreases the risk of endometrial carcinoma assosiated with unopposed oestrogen
Presentation of anaphylaxis
Vasodilation Hypotension Tachycardia Bronchospasm Interstitial pneumonitis urticaria Angioedema Bronchospasm Tissue oedema
Drugs that may cause anaphylaxis
NSAIDs / aspirin B lactam antibiotics Chemo Vaccines Parenteral iron injections Herbal preparations
How is allopurinol’s therapeutic effect monitored?
Serum urate
What is used to assess the beneficial effect of IV fluids when dehydrated?
BP
How is HRT monitored and when must it be stopped in relation to this?
BP
Stop if systolic > 160 or diastolic > 95
If you are on a statin and transaminases are > 3x upper limit of normal, what do you do?
Discontinue