Exam aid · Exam-specific: Gulf licensing

Gulf Exam Clinical Essentials

Pregnancy, renal dosing, key interactions and monitoring for Gulf licensing exams.

Tables to memorise

Cover the right-hand column and test yourself before checking.

Avoid	Usually preferred instead
ACE inhibitors / ARBs (hypertension)	Labetalol, nifedipine, methyldopa
Warfarin (anticoagulation)	Low-molecular-weight heparin
Statins	Usually stopped during pregnancy
Valproate, phenytoin, carbamazepine	Specialist review; lamotrigine or levetiracetam often used
Tetracyclines	Penicillins or cephalosporins
Fluoroquinolones	Penicillins, cephalosporins or nitrofurantoin (UTI, not at term)
Isotretinoin, methotrexate	Absolutely contraindicated
NSAIDs (especially third trimester)	Paracetamol

Drug	Key renal rule
Metformin	Review dose at eGFR 30–45; contraindicated below 30
Nitrofurantoin	Generally avoid below eGFR 45; a short course may be used at 30–44 if benefit outweighs risk
Dabigatran	Mostly renally cleared; avoid in severe impairment
Gentamicin / amikacin	Extend interval and monitor levels
Vancomycin	Dose by levels (trough or AUC) and renal function
Gabapentin / pregabalin	Reduce dose as creatinine clearance falls
Lithium	Reduce dose and monitor levels closely
Spironolactone / ACE inhibitors	Watch potassium; avoid combination in poor renal function

Combination	Result
Warfarin + metronidazole / fluconazole / amiodarone	INR rises, bleeding risk
Warfarin + rifampicin	INR falls, clotting risk
Simvastatin + clarithromycin / itraconazole	Myopathy, rhabdomyolysis
Clopidogrel + omeprazole	Reduced antiplatelet effect (use pantoprazole)
SSRI + linezolid / tramadol / MAOI	Serotonin syndrome
Allopurinol + azathioprine	Bone marrow toxicity
Lithium + thiazide / NSAID / ACE inhibitor	Lithium toxicity
Macrolide / fluoroquinolone + other QT drugs	QT prolongation, torsades
ACE inhibitor + spironolactone + potassium	Hyperkalaemia
Sildenafil + nitrates	Severe hypotension (contraindicated)

Drug	What to monitor
Warfarin	INR (usual target 2–3)
Amiodarone	Thyroid, liver, lungs, eyes
Lithium	Levels, renal and thyroid function
Statins	Lipids; liver enzymes and CK if symptoms
ACE inhibitors	Potassium and creatinine
Methotrexate	FBC and liver function
Clozapine	Absolute neutrophil count
Digoxin	Levels, potassium, renal function, heart rate

Read the patient details first: age, pregnancy, kidney function, allergies and current drugs decide most answers.
ACE inhibitors and ARBs are fetotoxic in the second and third trimesters.
Steady state takes about 4–5 half-lives, whatever the dose.
Metronidazole + alcohol can cause a disulfiram-like reaction.
Intramuscular adrenaline is first-line for anaphylaxis; antihistamines are adjuncts.
Pantoprazole is the PPI of choice with clopidogrel.

SICKFACES.COM: Common enzyme inhibitors: Sodium valproate, Isoniazid, Cimetidine, Ketoconazole, Fluconazole, Alcohol (acute), Chloramphenicol, Erythromycin, Sulfonamides, Ciprofloxacin, Omeprazole, Metronidazole.

Attempt MCQs on these topics while the sheet is fresh. Anything you get wrong goes to your incorrect list for the next round.