Some combinations are better tolerated than single drugs
In short-term trials, treatment stopping due to side effects differed by drug type, and some two-drug combinations were tolerated as well as or better than placebo.
*Systematic review and network meta-analysis of randomized trials; Level 1a.
Citation
Wang N, Van Der Hoorn S, Pant R, et al. Adverse effects and treatment discontinuation of blood pressure–lowering drugs and combinations: A network meta-analysis. JAMA. 2026;335(24):2135-2145. doi:10.1001/jama.2026.6214
Background
Concerns about side effects from blood pressure–lowering medicines can delay starting treatment and lead to early stopping. This study compared short-term side effects and stopping rates across major drug classes and combinations.
Patients
Adults in double-blind randomized trials (mostly hypertension; mean age 54.6 years; 44% women). Excluded: trials longer than 26 weeks and trials with an active “run-in” period.
Intervention
Blood pressure–lowering drugs from 5 major classes and their combinations.
Control
Placebo or another active drug regimen.
Outcome
Stopping assigned treatment due to side effects (primary); dizziness, headache, swelling of legs/ankles, cough (secondary).
Follow-up Period
4–26 weeks (mean 8.6 weeks).
Results
716 trials (159,362 participants). Compared with placebo, the following differences were significant:
| Outcome |
Regimen vs placebo |
Effect |
Absolute change |
Number needed to treat (or harm) |
| Stopped treatment due to side effects (primary) |
Calcium channel blockers |
Odds ratio 1.43 (1.23–1.67) |
+1.2% |
Harm: 84 |
| Stopped treatment due to side effects (primary) |
Angiotensin-converting enzyme inhibitor + calcium channel blocker |
Odds ratio 1.46 (1.13–1.87) |
+1.1% |
Harm: 91 |
| Stopped treatment due to side effects (primary) |
Beta-blocker + thiazide diuretic |
Odds ratio 1.58 (1.04–2.47) |
+1.7% |
Harm: 59 |
| Stopped treatment due to side effects (primary) |
Angiotensin II receptor blocker |
Odds ratio 0.73 (0.61–0.86) |
−0.8% |
Treat: 125 |
| Stopped treatment due to side effects (primary) |
Angiotensin II receptor blocker + calcium channel blocker |
Odds ratio 0.61 (0.47–0.79) |
−1.2% |
Treat: 84 |
Limitations
Short follow-up (weeks), so later side effects and long-term stopping were not assessed. Results rely on network meta-analysis assumptions and trial-level (not individual) data. Absolute differences in stopping were small (about 1–2%).
Funding
Australia’s National Health and Medical Research Council; no role in study conduct.
Clinical Application
When choosing initial therapy, consider an angiotensin II receptor blocker (often with a calcium channel blocker) to reduce early stopping; counsel about dizziness and monitor for swelling.