Does Losartan Cause a Cough?
Losartan, an angiotensin II receptor blocker (ARB) used for high blood pressure, does not typically cause a dry cough. This side effect is rare with ARBs, affecting less than 1% of patients in clinical trials.[1][2]
Why Do Some Blood Pressure Meds Cause Cough?
Cough is a well-known issue with ACE inhibitors like lisinopril or enalapril, occurring in up to 20% of users. It happens because these drugs increase bradykinin levels, irritating the lungs. Losartan blocks angiotensin II receptors without raising bradykinin, so cough risk stays low.[1][3]
How Often Does Cough Happen with Losartan?
In studies, cough rates with losartan match placebo (around 1-2%). A large trial comparing losartan to captopril (an ACE inhibitor) found cough in 1.9% of losartan patients versus 29% on captopril.[2][4] Persistent cough should prompt a doctor visit to rule out other causes like infections or allergies.
What If You're Switching from an ACE Inhibitor?
Patients with ACE inhibitor cough often switch to losartan or other ARBs, with over 90% seeing symptoms resolve within weeks. Improvement typically starts in 1-4 weeks.[3][5]
Are There Exceptions or Related Risks?
Rare cough reports exist, possibly from unrelated factors or losartan-hydrochlorothiazide combos (where diuretic side effects overlap). Upper respiratory infections occur slightly more with losartan (3.2% vs. 2.5% placebo).[1][2] No strong link to serious lung issues.
[1]: Losartan Prescribing Information (FDA)
[2]: ELITE II Trial (Lancet, 1999)
[3]: Mayo Clinic - ACE vs ARB Cough
[4]: Drugs.com - Losartan Side Effects
[5]: American Heart Association Guidelines