Passmed PSA Revision Flashcards
Drugs that cause impaired glucose tolerance
- Thiazides, furosemide (less common)
- Steroids
- Tacrolimus, ciclosporin
- Interferon-alpha
- Nicotinic acid
- Antipsychotics
Drugs causing urinary retention
- Tricyclic antidepressants e.g. amitriptyline
- Anticholinergics e.g. antipsychotics, antihistamines
- Opioids
- NSAIDs
- Disopyramide
Drugs causing lung fibrosis
- Amiodarone
- Cytotoxic agents: busulphan, bleomycin
- Anti-rheumatoid drugs: methotrexate, sulfasalazine
- Nitrofurantoin
- Ergot-derived dopamine receptor agonists (bromocriptine, cabergoline, pergolide)
Side-effects of Rifampicin
- Hepatitis
- Orange secretions
- Flu like symptoms
Side-effects of Isoniazid
- Peripheral neuropathy
- Hepatitis
- Agranulocytosis
Side-effects of pyrazinamide
- Hyperuricaemia causing gout
- Arthralgia
- Myalgia
- Hepatitis
Side-effects of ethambutol
- Optic neuritis
Which tuberculosis medications do you stop if the patient develops hepatitis?
- Pyrazinamide
- Rifampicin
- Isoniazid
How much paracetamol should a child have?
20mg/kg, every 6-8 hours
What is the initial dose of allopurinol and what should the uric acid levels aim to be?
- Initial dose of 100 mg od
- Aim for serum uric acid of <300 umol/l
Side effects of allopurinol?
- Severe cutaneous adverse reaction
- Drug reaction with eosinophilia and systemic symptoms
- Stevens-Johnson syndrome
Drug interactions with allopurinol?
- Azathiprine
- Cyclophosphamide
- Theophylline
Why shouldn’t children under 16 take aspirin?
Reye’s disease
If digoxin toxicity is suspected when do you measure concentration levels?
8-12 hours after last dose
Features of digoxin toxicity/
- Generally unwell, lethargy, nausea & vomiting, anorexia, confusion, yellow-green vision
- Arrhythmias e.g. AV block, bradycardia
- Gynaecomastia
Drugs causing digoxin toxicity?
- Amiodarone
- Quinidine
- Verapamil
- Diltiazem
- Spironolactone
- Ciclosporin
- Thiazide and loop diuretics
Treatment of digoxin toxicity?
- Digibind
- Correct arrhythmias
- Monitor potassium
Gentamicin adverse effects?
- Ototoxicity
-Nephrotoxicity
Contraindications of gentamicin?
Myasthenia gravis
When should you measure gentamicin levels?
What should you do if trough (pre-dose) level is high?
What should you do if peak (post dose) level is high?
- Measure peak (1 hour after administration) and trough (just before next dose)
- If trough (pre-dose) is high the intervals between the doses should be increased
- If peak (post-dose) is high the dose should be increased
Adverse effects of heparins?
- Bleeding
- Thrombocytopenia
- Osteoporosis
- Hyperkalaemia
How to reverse heparin overdose?
Protamine sulphate
Adverse effects of octreotide?
Gallstones
Uses of octreotide?
- Acute treatment of variceal haemorrhage
- Acromegaly
- Carcinoid syndrome
What causes lithium toxicity?
- Dehydration
- Renal failure
- Drugs- diuretics, ACE inhibitors, angiotensin II receptor blockers, NSAIDs and metronidazole
Features of lithium toxicity?
- Coarse tremor
- Hyperreflexia
- Acute confusion
- Polyuria
- Seizure
- Coma
Management of lithium toxicity?
- Volume resuscitation with normal saline
- Haemodialysis
- Sodium bicarbonate
Adverse effects of macrolides?
- Prolonged QT interval
- GI side effects
- Cholestatic jaundice
- Azithromycin is associated with hearing loss and tinnitus
Interactions of macrolides?
- Statins should be stopped whilst taking a course of macrolides - increases risk of myopathy and rhabdomyolsis
Does metformin cause hypoglycaemia?
No
Do sulphonylureas cause hypoglycaemia?
Yes
Adverse effects of metformin?
- GI upset- nausea, anorexia, diarrhoea
- Reduced vitamin B12 absorption
- Lactic acidosis
Contraindications of metformin?
- Chronic kidney disease
- Periods of tissue hypoxia
- Iodine containing X-ray contrast media
- Alcohol abuse
Management of paracetamol overdose?
- Activated charcoal if ingested <1 hour
- N-acetylcysteine
- Liver transplant
Opioid overdose treatment?
- Naloxone
Tricyclic antidepressant overdose management?
- IV bicarbonate
Warfarin overdose management?
- Vitamin K
- Prothrombin complex
Heparin overdose treatment?
- Protamine sulphate
Contraindications of phosphodiesterase type V inhibitors e.g. sildenafil
- Patients taking nitrates
- Hypotension
- Recent stroke or MI
Side effects of sildenafil?
- Visual disturbances- blue discolouration
- Nasal congestion
- Flushing
- GI Side effects
- Headache
- Priapism
Drugs used with caution in patients with asthma?
- NSAIDs
- Beta blockers
- Adenosine- verapamil is used as an alternative
Drugs worsening seizure control in patients with epilepsy?
- Alcohol, cocaine, amphetamines
- Ciprofloxacin, levofloxacin
- Aminophylline, theophylline
- Bupropion
- Methylphenidate
- Mefenamic acid
Drugs exacerbating heart failure?
- Thiazolidinediones
- Verapamil
- NSAIDs/ glucocorticoids
- Class 1 antiarrhythmics
Which drugs should be used with caution in patients with ischaemic heart disease?
- NSAIDs
- Oestrogens
- Varenicline
Drugs to avoid in renal failure?
- Antibiotics - tetracycline, nitrofurantoin
- NSAIDs
- Lithium
- Metformin
Antibiotics harmful in pregnancy?
- Tetracyclines
- Aminoglycosides
- Sulphonamides and trimethoprim
- Quinolones
Drugs (excluding antibiotics) that are harmful during pregnancy?
- ACE inhibitors, angiotensin II receptor antagonists
- Statins
- Warfarin
- Sulfonylureas
- Retinoids
- Cytotoxic agents
Adverse effects of quinolones?
- Lower seizure threshold
- Tendon damage
- Cartilage damage
- Lengthens QT