Pharmacology Flashcards
What are the S/Es of rifampicin?
Orange bodily fluids, rash, hepatotoxicity, drug interactions
What are the S/Es of isoniazid?
Peripheral neuropathy, psychosis, hepatotoxicity
What are the S/Es of pyrazinamide?
Arthralgia, gout, hepatotoxicity, nausea
What are the S/Es of ethambutol?
Optic neuritis, rash
What drugs can cause urinary retention?
Amitriptyline Anticholinergics Opioids NSAIDs Disopyramide
How is beta-blocker OD corrected?
Atropine –> in resistant cases, glucagon may be used
How is ethylene glycol and methanol OD corrected?
Fomepizole, an inhibitor of alcohol dehydrogenase, is now used first-line in preference to ethanol –> in refractory cases haemodialysis may be used
How is cyanide poisoning treated?
Hydroxocobalamin
How is lead poisoning treated?
Dimercaprol
How is iron poisoning treated?
Desferrioxamine
How is severe lithium toxicity treated?
Haemodialysis
How is cocaine toxicity managed?
BZDs in the main, if chest pain develops, BZDs + GTN, then if MI develops PPCI. In HTN = BZD + nitroprusside
What are the criteria for liver transplantation as a result of paracetamol-induced liver failure?
Arterial pH < 7.3, 24 hours after ingestion
Or all of the following:
Prothrombin time > 100 seconds
Creatinine > 300 µmol/l
Grade III or IV encephalopathy
Which antibiotics can lower the seizure threshold in epilepsy?
Quinolones - e.g. ciprofloxacin and levofloaxacin
How is tricyclic antidepressant OD managed?
IV bicarbonate, mainly to reduce the risk of seizures
Which drugs can cause lung fibrosis?
Amiodarone
Cytotoxic agents - busulphan, bleomycin
Anti-rheumatoid drugs: methotrexate, sulfasalazine
nitrofurantoin
Ergot-derived dopamine receptor agonists - bromocriptine, cabergoline, pergolide
With what drugs does allopurinol interact?
Azathioprine - excessive myelosuppression = increased risk of neutropenic sepsis
Cyclophosphamide = marrow toxicity
Theophylline = increased theophylline plasma concentration
Patients with which syndrome may take allopurinol for life?
Lesch-Nyhan syndrome
When should allopurinol be offered to patients?
After their first attack of gout, in particular for patients whom have:
>= 2 attacks in 12 months
Tophi
Renal disease
Uric acid renal stones
Prophylaxis if on cytotoxics or diuretics
Which Abx causes a rash when given when a pt has mono?
Amoxicillin
Which drugs can precipitate digoxin toxicity?
Amiodarone Quinidine Verapamil Diltiazem Spironolactone Ciclosporin Also drugs which cause hypokalaemia e.g. thiazides and loop diuretics