…and heart failure resembles that of selective COX-2 inhibitors and is seen already at doses below 100 mg/day and with short treatment duration…

…between liver and kidney, giving a predictable dose–effect relationship without the CYP2D6-dependent variability that makes metoprolol response unpredictable. The half-life of 10…

…selective of the SSRIs and one of the best tolerated for depression and generalised anxiety disorder. What governs dosing is not efficacy but the heart…

…choose when reversibility matters. With a half-life of 9 minutes and the effect gone 20–30 minutes after the infusion ends, it is useful…

…Unlike verapamil and diltiazem, amlodipine has no clinically significant negative inotropic effect and can therefore be used in heart failure with reduced ejection fraction when…

…reduced heart failure events regardless of ejection fraction in EMPEROR-Reduced and EMPEROR-Preserved, and slowed renal function decline down to eGFR 20 in EMPA…

…and stable angina. The selectivity for vascular smooth muscle means felodipine lacks the nodal effects of verapamil and diltiazem — no bradycardia, no AV block, and…

…where the lowest effective dose for the shortest possible time is the whole principle. What governs safety is the QT interval and extrapyramidal adverse effects.

…and atrial tachycardia are unmasked when the ventricular response is slowed. The half-life of a few seconds means both the effect and side effects…

…The active metabolite of enalapril, given directly intravenously. Rarely used in hypertensive crisis: onset is slow, duration 8–24 hours, and the effect varies widely…

…in the loop of Henle. The dose–response relationship is a threshold curve, not a line: below the threshold nothing happens, and in renal failure…

…maximised and the LDL target is still not reached — a fixed dose of 10 mg, no titration, essentially no interactions, and an adverse effect profile…

…and nocturnal enuresis, and haemostatic release of von Willebrand factor and factor VIII. Selectivity for the V2 receptor means it lacks the vasoconstrictive effect of…

…injection, and the long biological duration means a single dose suffices. Potency is approximately 25 times that of hydrocortisone and mineralocorticoid effect is absent, making…

…poorly, but it is not entirely free of sedation: a distinct minority of patients become drowsy, and this should be asked about in professional drivers…

…making the timing of administration a genuine treatment variable and not a formality. The most clinically important adverse effect is delayed: cholestatic liver injury can…

…and the one with the least cardiovascular risk at a low dose. A short half-life of around 2 hours means the effect arrives and…

…tenth of a millimole. Insulin-glucose, beta-agonists, and dialysis must be started in parallel, otherwise the arrhythmia risk returns when the calcium effect wanes…

…severe hypoglycaemia in a patient who cannot swallow and in whom intravenous access is available. The effect arrives within a minute but is also short…

…short notice. The disadvantages are continuous infusion, an unpredictable dose–response relationship due to binding to plasma proteins, and the risk of heparin-induced thrombocytopenia.

…duration of 3–5 hours; intravenously the half-life is a few minutes, which makes the infusion fully controllable but also means the effect ceases…

…and glucose continue to rise — higher doses therefore purchase side effects without blood pressure benefit. The antihypertensive effect is partly vasodilatory and persists after the…

…Reduces mortality in heart failure with reduced ejection fraction — the effect is dose-dependent, and underdosing is more often than adverse effects the reason for…

…A selective D1 agonist without alpha or beta effects, with onset within minutes and duration under one hour — theoretically attractive in hypertensive crisis with renal…

…the antidepressant range. The effect on pain occurs already at 10–50 mg and depends on noradrenergic and sodium-channel-mediated modulation, not on antidepressant…

…mineralocorticoid effect Endogenous cortisol in pharmaceutical form and accordingly the first choice when the intention is substitution rather than immunosuppression. Unlike prednisolone, betamethasone, and dexamethasone…

…β₂-stimulation dilates the vessels — completely without alpha effect. The result is that heart rate rises while systemic vascular resistance and diastolic blood pressure fall…

Apresolin BiDil Direct-acting arteriolar vasodilator Direct-acting arteriolar vasodilator with no effect on the venous circulation. The rapid afterload reduction triggers reflex sympathetic activation…

…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.

…inotropy when the problem is the pump and not vascular tone. Strong β₁ effect with marked β₂ effect means that stroke volume increases while systemic…

…for their entire lifespan. This is why a low once-daily dose is sufficient, and why the effect persists for 7–10 days after discontinuation.

…embolism and myocardial infarction use a fixed 100 mg — and confusing them is the most common serious error. The short half-life means the effect…

…even effect over 24 hours with once-daily dosing. The ARB that together with valsartan has documented mortality benefit in heart failure (CHARM), and the…

…acting dihydropyridine broken down by esterases in blood and tissue — the half-life is 5 minutes and the effect can be steered minute by minute…

…that a family member can give when the patient cannot swallow and intravenous access is unavailable — the effect arrives within ten minutes through hepatic glycogenolysis…

…never lets go. The effect is immediate and complete: unbound dabigatran in plasma falls by over 99 per cent directly after the infusion. The specificity…

…drug is ineffective in infranodal block. The effect comes within one minute and fades over an hour or so, making it a bridge to pacing…