Why does lisinopril cause a cough?
Last updated September 3, 2026.
ACE - the enzyme lisinopril blocks - also breaks down bradykinin, an airway irritant. Block the enzyme and bradykinin builds up, producing the dry, tickly, phlegm-free ACE-inhibitor cough. It can start hours in or months in; it affects a meaningful minority (women and nonsmokers more often); and cough medicine does not touch it, because it is not a lung problem. The fix: switch to an ARB (losartan, candesartan, valsartan) - same blood pressure system, one step downstream, no bradykinin buildup; the cough typically clears within 1 to 4 weeks of switching. Do not simply quit and leave your blood pressure uncovered - switch, not quit. Pymander is a free AI doctor, 24/7 by text, and can help you prepare that conversation.
What to do
- Recognize the pattern: dry, tickly, no phlegm, started (or worsened) after the ACE inhibitor.
- Ask for the ARB switch by name: losartan is the usual first pick.
- Give the switch 1 to 4 weeks: bradykinin needs time to wash out.
- Keep taking a BP pill meanwhile: the danger is untreated pressure, not the swap.
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