…Long-acting dihydropyridine calcium channel blocker A cornerstone drug for hypertension and stable angina, and the easiest calcium channel blocker to use: once-daily dosing…

…an advantage: the drug suits as-needed use and can be discontinued with rapid recovery of renal function and platelet function. The short duration is…

…20 in EMPA-KIDNEY. The glucose-lowering effect diminishes as eGFR falls, but the cardiorenal effect persists — which is the entire point of the drug.

…α- and β-agonist The only drug that reverses all components of anaphylaxis, and the cornerstone of cardiac arrest treatment. The most clinically dangerous property…

…channel inhibitor in the sinus node The only drug that reduces heart rate without affecting contractility, blood pressure, or conduction — it inhibits the funny current…

…selective alpha-blocker with onset within minutes and duration under half an hour. A niche drug: catecholamine-induced hypertensive crisis — phaeochromocytoma, cocaine and amphetamine intoxication…

…and the first months require flare prophylaxis because falling urate levels themselves trigger attacks. Two features make this drug dangerous: the hypersensitivity syndrome and the…

…which is the entire explanation for why the drug is ineffective in infranodal block. The effect comes within one minute and fades over an hour…

…80 % of absorbed drug is eliminated renally, so renal function governs treatment entirely. Dyspepsia affects one in ten patients and is the most common reason…

…in structurally normal hearts. The CAST trial showed increased mortality after myocardial infarction — that boundary remains the most important fact in the drug's history.

…and minimal anticholinergic burden. The drug has two entirely different dosing worlds: a few milligrams in acute psychotic agitation in younger patients, and tenths of…

…arteriolar vasodilator with no effect on the venous circulation. The rapid afterload reduction triggers reflex sympathetic activation, making the drug unsuitable as first-line treatment…

…blood pressure fall, so the drug raises rate but not pressure. Used where rate itself is the problem: bradycardia while awaiting pacing, bradycardia-dependent torsades…

…sodium-channel-mediated modulation, not on antidepressant action. What limits treatment is anticholinergic side effects, and what makes the drug dangerous is cardiotoxicity in overdose.

…maintenance-and-reliever therapy in the same inhaler. The two regimens must never be confused — this is the most common prescribing error with this drug.

…heparin, dalteparin is eliminated renally, so at eGFR below 30 ml/min the effect accumulates and the dose must be adjusted or the drug changed.

…with albuminuria, with or without diabetes. The dose is the same — 10 mg once daily — for all indications, making this drug unusually straightforward to manage.

…Selectivity for the V2 receptor means it lacks the vasoconstrictive effect of vasopressin. The danger is not the drug itself but the fluid the patient…

…placebo. IMPROVE-IT showed that the additional LDL lowering also translates into fewer cardiovascular events, making ezetimibe the first non-statin drug with outcome data.

…entirely different drugs in the same ampoule. In severe hypoglycaemia, 1 mg intramuscularly is the treatment that a family member can give when the patient…

…never a guarantee. The key practical distinction is between the three dose levels: analgesia, procedural sedation, and induction are different drugs in the same ampoule.