Does Losartan Cause a Chronic Dry Cough?
No, losartan does not typically cause a chronic dry cough. This side effect is rare with losartan and other angiotensin II receptor blockers (ARBs), occurring in less than 1% of patients in clinical trials.[1][2]
Why Do ACE Inhibitors Cause Cough but Not ARBs Like Losartan?
ACE inhibitors like lisinopril block angiotensin-converting enzyme, leading to buildup of bradykinin, a peptide that irritates airways and triggers dry cough in 5-20% of users.[3] Losartan works differently by blocking angiotensin II receptors without affecting bradykinin levels, so cough risk drops sharply.[1][4]
How Common Is Cough with Losartan?
In post-marketing data and trials, cough reports with losartan range from 0.1-1.1%, often resolving after switching drugs. It's not dose-dependent and usually mild.[2][5] Persistent cough linked to losartan is exceptional and may signal another cause like infection or allergy.
What If You Get a Dry Cough on Losartan?
Stop the drug and consult a doctor—cough could stem from underlying conditions (e.g., GERD, asthma) or unrelated meds. Switching to another ARB like valsartan rarely helps if cough appears, as the class effect is minimal.[4][6]
Alternatives for Patients Prone to Cough
Patients with ACE inhibitor cough histories tolerate ARBs like losartan well 95%+ of the time. Options include:
- Other ARBs: candesartan, olmesartan.
- Calcium channel blockers: amlodipine.
- Diuretics: chlorthalidone.[3][7]
| Drug Class | Cough Incidence |
|------------|-----------------|
| ACEIs (e.g., lisinopril) | 5-20% |
| ARBs (e.g., losartan) | <1% |
| Beta-blockers (e.g., metoprolol) | <1% |
When Does Cough Resolve After Stopping Losartan?
Any ARB-related cough typically fades within 1-4 weeks of discontinuation, faster than ACEI cough (up to 3 months).[4][8]
[1]: FDA Losartan Label
[2]: Drugs.com Losartan Side Effects
[3]: NEJM: ACE Inhibitor Cough
[4]: American Family Physician: ARB vs ACEI
[5]: RxList Losartan
[6]: Mayo Clinic: ARB Tolerability
[7]: JNC 8 Guidelines
[8]: Hypertension Journal: Cough Resolution