Can losartan cause swelling (edema)?
Swelling can occur with losartan, but it is not one of the most common side effects. The main swelling-related concern people search for is angioedema, which is a rare but serious reaction involving swelling of the face, lips, tongue, throat, or sometimes the hands/feet.
What kind of swelling is most concerning?
The most urgent type is swelling that comes with breathing or swallowing problems, voice changes, or swelling around the mouth/face. That pattern can suggest angioedema. If swelling affects breathing, seek emergency care right away.
How common is swelling with losartan?
Losartan is generally well tolerated, and most reports of swelling-related reactions are rare. Common side effects more often include things like dizziness or low blood pressure, but swelling can still occur in some people.
Are there other blood pressure medicines that are more linked to swelling?
Angiotensin-converting enzyme (ACE) inhibitors (a different class) are more strongly associated with angioedema than ARBs like losartan. Still, ARB-related angioedema can happen, just less often.
What should you do if you notice swelling?
If you notice new swelling while taking losartan, stop and contact a clinician promptly—especially if it’s facial, involves the lips/tongue/throat, or is accompanied by trouble breathing. If it’s mild and involves the legs/feet only, you should still ask your prescriber, because swelling can also come from other causes (such as heart, kidney, liver issues, or other medications).
Could swelling be from a drug interaction or another condition?
Yes. Swelling can be caused by many factors, including other medications, kidney problems, heart problems, or changes in salt/fluid balance. A clinician can help determine whether losartan is the likely cause.
When to get emergency help
Get emergency help immediately if swelling is paired with any of the following: trouble breathing, throat tightness, trouble swallowing, hives, or swelling of the face/lips/tongue.
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