Does Cozaar Cause Dry Cough?
Cozaar (losartan), an angiotensin II receptor blocker (ARB) used for high blood pressure, rarely causes a persistent dry cough. Cough occurs in about 1-2% of patients in clinical trials, much less frequently than with ACE inhibitors like lisinopril, where rates exceed 10%.[1] This side effect typically resolves if it appears, unlike the stubborn cough from ACE inhibitors caused by bradykinin buildup.
Why Does Cough Happen with ARBs Like Cozaar?
ARBs block angiotensin II receptors without inhibiting ACE, so they avoid the bradykinin accumulation that triggers cough in ACE inhibitors. When cough does occur with losartan, it's often mild, non-productive, and linked to individual sensitivity rather than the drug's main mechanism. Upper respiratory infections or concurrent meds can mimic or worsen it.[2]
How Common Is Persistent Cough and When Does It Start?
Persistent cases are uncommon; most resolve within weeks of starting treatment. In post-marketing reports, cough led to discontinuation in under 1% of users. It usually begins 1-2 weeks after initiation but can appear later. If it lasts beyond a month, doctors check for other causes like GERD, asthma, or allergies before switching drugs.[1][3]
What Should You Do If You Get a Dry Cough on Cozaar?
Consult your doctor—don't stop abruptly, as it controls blood pressure. They may switch to another ARB (like valsartan) or add a cough suppressant temporarily. Monitoring is key, especially if you have a history of ACE inhibitor cough.[2]
How Does Cozaar Compare to ACE Inhibitors for Cough Risk?
| Drug Class | Example | Cough Incidence | Persistence |
|------------|---------|-----------------|-------------|
| ACE Inhibitors | Lisinopril | 5-20% | Often persistent, 20-30% don't resolve |
| ARBs | Cozaar (losartan) | 1-2% | Usually mild/transient |
Patients switching from ACE inhibitors to Cozaar often report cough relief.[1][3]
Other Cough Causes to Rule Out
Dry cough on Cozaar might stem from smoking, post-nasal drip, heart failure (which it treats), or COVID-19 aftermath—not the drug itself. Track symptoms and timing with your prescriber.[2]
[1]: Cozaar Prescribing Information (FDA)
[2]: Mayo Clinic - Losartan Side Effects
[3]: Drugs.com - Cozaar Side Effects