Questioning Medicine

This massive meta-analysis of 484 randomized, double-blind, placebo-controlled trials (104,176 participants) quantified the blood pressure–lowering effects of major antihypertensive drug classes and their combinations. It introduces a new intensity-based classification system and an online calculator to predict BP-lowering efficacy based on drug, dose, and baseline BP.Study Design: 484 trials, 104,176 participants 5 major drug classes: ACE inhibitors, ARBs, β-blockers, calcium channel blockers (CCBs), and diuretics Focus: Placebo-corrected reduction in systolic BP (SBP) Mean baseline BP: 154/100 mm Hg Mean follow-up: 8.6 weeks Key Findings Monotherapy (Standard Dose): Average SBP reduction: 8.7 mm Hg By class: ACE inhibitors: 6.8 mm Hg ARBs: 8.5 mm Hg β-blockers: 8.9 mm Hg CCBs: 9.5 mm Hg Thiazide diuretics: 10.8 mm Hg Dose Doubling:Adds ~1.5 mm Hg SBP reduction (except β-blockers, which add only ~0.5 mm Hg) Dual Therapy (Standard Dose of Each): Average SBP reduction: 14.9 mm Hg Dose doubling adds ~2.5