A blood pressure medication recall has raised concerns after certain batches were found to contain higher-than-acceptable levels of a chemical impurity that may increase cancer risk.
The recall involved certain prazosin hydrochloride capsules, a prescription medicine used to treat high blood pressure and also prescribed for other conditions. More than 580,000 bottles were included in the 2025 U.S. recall.
Why Was the Medication Recalled?
The affected medication was found to contain a type of chemical called a nitrosamine impurity. Some nitrosamines are considered potentially carcinogenic, which means long-term exposure may increase cancer risk.
Importantly, the presence of a contaminant does not mean that everyone who took the recalled medication will develop cancer. The concern relates to exposure above established safety limits and is one reason regulators monitor the quality of prescription medicines closely.
The FDA maintains a searchable database of drug recalls and explains that recalls are used to remove defective or potentially harmful medicines from the market.
Which Blood Pressure Medicine Was Involved?
The 2025 recall involved certain lots of prazosin hydrochloride capsules in 1 mg, 2 mg, and 5 mg strengths.
Not every bottle of prazosin was necessarily affected. Drug recalls generally apply to specific manufacturers, lots, strengths, or expiration dates rather than every product with the same active ingredient.
This is why patients should check the exact information on their prescription bottle rather than assuming that their medication is part of the recall.
What Are Nitrosamine Impurities?
Nitrosamines are chemical compounds that can occur in some medicines as impurities. Regulatory agencies monitor these substances because prolonged exposure to certain nitrosamines may increase the risk of cancer.
Nitrosamine contamination has previously resulted in recalls involving several classes of medicines, including some valsartan, losartan, and irbesartan products.
Should You Stop Taking Your Blood Pressure Medicine?
If you take a blood pressure medication that may be affected by a recall, do not stop taking it on your own.
Suddenly stopping or changing a prescription blood pressure medicine can cause your blood pressure to rise and may create serious health risks.
Instead, check the medication name, strength, manufacturer, lot number, and expiration date against the official recall information. If your medication is affected, contact your doctor or pharmacist about an appropriate replacement.
What Should Patients Do?
If you are concerned about a medication you are taking:
- Check the name and strength printed on the bottle.
- Look for the manufacturer and lot number.
- Check the latest recall information from your country’s medicine regulator or ask your pharmacist.
- Do not discontinue your prescription without medical advice.
- If your medicine has been recalled, ask your healthcare professional whether you should switch to another product.
Does Taking a Recalled Medicine Mean You Will Get Cancer?
No.
A recall because of a potentially carcinogenic impurity does not mean that every person who used the medicine will develop cancer.
The potential risk depends on factors such as the level of contamination, how long someone was exposed, and the individual’s overall circumstances. Regulators set acceptable intake limits with these risks in mind.
The purpose of a recall is to reduce unnecessary exposure and protect patients.
The Bottom Line
Medication recalls can be alarming, especially when the words “cancer-causing chemical” are involved. However, patients should avoid panic and should not stop essential blood pressure medication without speaking with a healthcare professional.
If you take prazosin or another blood pressure medicine, check whether your specific product and lot are affected by a current recall. The FDA provides a searchable database of drug recalls for medicines distributed in the United States.
For patients outside the United States, including those taking medicines purchased in other countries, the appropriate national medicines regulator or a local pharmacist can provide information about recalls applicable to their market.
Medical disclaimer: This article is for general informational purposes only and is not a substitute for advice from a doctor or pharmacist.