Year 3 drugs Flashcards
Aciclovir: drug class
Nucleoside analogue (antiviral)
Aciclovir: indications
Cold sores
Genital herpes
Eye infections
Chicken pox
Shingles
Aciclovir: local herpes treatment dose
Eye: 1cm 5 times a day, continue for 3 days after complete healing of infection
Skin: Every 4 hours, 5 time per day for 5-10 days
Aciclovir: Shingles dose
800 mg 5 times per day for 1 week
Aciclovir: genital herpes dose
200 mg 5 times per day for 5 days (continue for longer is new lesions appear). Or 400 mg 3 times per day for 5 days.
Aciclovir: common side effects
- Headaches (oral)
- Dizziness (oral)
- Nausea and vomiting (IV and oral)
Aciclovir: metabolised by
Kidneys
Aciclovir: contraindications
None
Aciclovir: can it be used in children?
Yes
Aciclovir: mechanism
Converted to aciclovir triphosphate via a series of kinase reactions. Aciclovir triphosphate binds and incorporates into the viral DNA and causes DNA chain termination. This inactivates the viral DNA polymerase, causing viral cell death
Amoxicillin: drug class
Penicillin
Amoxicillin: indications
Pneumonia
Hospital-acquired infection
Acute infection
Dental abscess
Amoxicillin: standard dose
500 mg tds
Amoxicillin: dose for prophylaxis of recurrent UTI
250 mg on
Amoxcillin: side effects
- Nausea
- Diarrhoea
- Rash (allergy)
Amoxcillin: interactions
Methotrexate (reduced excretion rate, risk of toxicity)
Warfarin (enhances effects)
Allopurinol (increased risk of rash)
Amoxicillin: dose in children
500 mg tds (5-17 years)
Amoxicillin: mechanism
Amoxicillin is a b-lactam antibiotic. It inhibits penicillin-binding proteins (PBPs) which are involved in transpeptidation of the cell wall, therefore cross-linking of peptidoglycans cannot occur, leading to weakness of the cell wall and cell death.
Aciclovir: pregnancy?
Yes - safest antiviral
Amoxicillin: preganancy
Safe
Beclomethasone: drug class
Corticosteroid
Beclomethasone: indications
Oral ulcerations
Asthma
Inflammatory skin disorders
Beclomethasone: asthma dose
200-400 mcg bd
Depends on brand
Beclomethasone: oral ulceration dose
50-100 mcg bd using inhaler device
Beclomethasone: ulcerative colitis dose
5 mg om, max 4 weeks
Beclomethasone: common side effects
Headaches
Oral candidiasis
Dry throat
Pneumonia in COPD patients
Beclomethasone: severe side effect
Cushing’s disease
Beclomethasone: contraindications
Systemic infections
Acne
Live virus vaccines
Beclomethasone: counselling
Rinse mouth
Look out for fungal infections
Same brand
Steroid card
Beclomethasone: mechanism
Prodrug, binds to GR, dimerises and translocates into nucleus to alter transcription (increase anti-inflammatory and decrease pro-inflammatory)
Beclomethasone: Pregnancy
Inhalers are safe
Aciclovir dilution solution
Sodium chloride 0.9%
Amoxicillin counselling
Space doses evenly
Finish course
Amoxicillin dilution solution
Glucose 5% or Sodium chloride 0.9%
Ciprofloxacin drug class
2nd gen fluoroquinolone (antibiotic)
Ciprofloxacin uses
Eye infections
Corneal ulcer
Otitis externa
UTI
Diabetic foot
Ciprofloxacin common side effects
- Reduced apetite
- Diarrhoea
- Nausea
- Eye discomfort
Cirpofloxacin serious side effects
- Severe tiredness
- Confusion
- Pain or abnormal sensations
Cirpofloxacin - pregnancy
Avoid
Ciprofloxacin cautionary labels
Avoid milk, indigestion remedies or
Finish the course
Swallow whole
Chloramphenicol drug class
Antibacterial
Chloramphenicol uses
Eye and ear infections
Serious systemic infections
Chloramphenicol contraindications
Acute porphyrias
Chloramphenicol - pregnancy
Avoid
Chloramphenicol - renal and hepatic
Caution
Chloramphenicol - eye infection dose
1 drop every 2 hours for the first 48 hours then reduce to every 4 hours for a further 3 days
Cefalexin dose
250 mg every 6 hours
Chlorphenamine - class
antihistamine - drowsy
Chlorphenamine - uses
Allergies
Chlorphenamine dose
4 mg every 4-6 hours
Chlorphenamine side effects
drowsiness
Chlorphenamine pregnancy
avoid
Chlorphenamine cautionary label
Drowsiness, don’t drink or drive/use machinery
Cyclizine drug class
Antiemetic - H1 antagonsit
Cyclizine uses
Nausea and vomiting
Morning sickness
Motion sickness
Cyclizine dose
50 mg tds
1-2 hours before travelling