Is an expired losartan still safe to take?
Using blood pressure medicines after the expiration date is risky because the drug’s strength can drop over time. For losartan, which is used to prevent serious outcomes like stroke and heart attack, that means you may not get the blood-pressure control your prescription is intended to provide. [1]
Expired medicines also can break down into unwanted byproducts. In the past, some angiotensin II receptor blockers (ARBs), including losartan, have been linked to recalls tied to impurities; that’s one reason pharmacies and regulators treat expiration dating seriously. [2]
What should you do if you only have expired losartan at home?
The safest approach is to not take it and get a replacement. Contact your pharmacy or prescriber to refill or switch to an alternative. If you’re unsure whether your specific product is affected by a recall, your pharmacist can check the exact lot number.
If you have already taken doses from the expired bottle, don’t stop or double up to “make up” doses. Call your pharmacist or prescriber for guidance on your next dose based on how long it has been expired and your current blood pressure and medical conditions.
How long past the expiration date is it okay to use?
There is no reliable “safe” window past the expiration date for prescription blood pressure drugs. Expiration dates are set to reflect potency and stability up to that date under proper storage. Even if tablets “look normal,” potency can still decline. [1]
What if the label says “use by” or the bottle is only a little expired?
“Use by” is still an expiration date for medication quality and potency. Even short delays can matter for chronic medicines like losartan where steady dosing is important. [1]
Do storage conditions change the answer?
Yes. Heat, humidity, and light can degrade tablets faster. If your losartan has been stored in a warm or humid place (for example, a bathroom cabinet or a car), it increases the chance that it’s not reliably potent after the expiration date. Still, even with good storage, you cannot count on an expired product being equivalent to an unexpired one. [1]
When should you get urgent help?
If you stop your blood pressure medicine, you might see higher readings. Seek urgent medical care if you have chest pain, severe shortness of breath, signs of stroke (face droop, arm weakness, trouble speaking), or very high blood pressure symptoms. Otherwise, call your pharmacist or clinician promptly to arrange a replacement.
---
Sources
[1] U.S. Food and Drug Administration (FDA) – Expiration dating and medicine stability information: https://www.fda.gov/drugs/buying-using-medicines-safely/ensuring-safe-use-medicines/medicine-expiration-dating
[2] FDA – ARB blood pressure medicine recalls/impurity updates (including losartan): https://www.fda.gov/drugs/drug-safety-and-availability/recalls-market-withdrawals-safety-alerts