
More than 25,000 bottles of a blood pressure medication have been recalled in the US after the tablets failed dissolution testing, raising concerns about how effectively the medicine may be absorbed.
Inventia Healthcare Limited has issued two recalls covering its chlorthalidone tablets, according to US Food and Drug Administration (FDA) enforcement records.
The issue means the tablets did not meet the required dissolution specifications, which can affect how the active ingredient is released and absorbed.
The National Library of Medicine explains that chlortalidone (also spelt chlorthalidone) is a potent, long-acting thiazide-like diuretic primarily prescribed to treat high blood pressure (hypertension) and reduce fluid accumulation (oedema/edema) caused by conditions like heart failure, liver disease, or kidney dysfunction.
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It helps lower blood pressure by increasing the amount of salt and water removed from the body through urine.

The FDA has classified both recalls as Class II, meaning that use of the affected product may cause temporary or medically reversible health consequences, or that the likelihood of serious harm is considered remote.
"Using the drug may cause temporary health consequences, but the probability of a serious health issue is remote. These recalls are generally conducted at the retail level, and patients and consumers can continue using the medicine unless otherwise directed by the recalling company or FDA," the official FDA website explains when referring to a Class II recall.
What blood pressure medication is recalled?
The recall affects Inventia Healthcare Limited's 25mg chlorthalidone tablets, supplied in bottles containing either 100 or 1,000 tablets. The affected products expire in April 2027.
The recall numbers, as listed in FDA enforcement records, are:
- D-0610-2026: 11,460 bottles
- D-0852-2026: 13,567 bottles
- Total: 25,027 bottles
The affected batch codes are:
- RISA24001
- RISB24002
- RISA24002

The first recall was initiated on June 5, affecting 11,460 bottles.
Meanwhile, the second was initiated later in the year and covers another 13,567 bottles.
What to do if you have the recalled medication
Patients should check the batch number on their prescription bottle against the affected codes and speak to their doctor or pharmacist if they believe they have a recalled product.
The FDA says, specifically for Class II and III recalls, 'consumers can generally continue taking the medicine unless the recalling company provides other instructions'.
"In some instances, stopping your medicine may be more harmful to your health than continuing to take the recalled medicine. Talk to your doctor or pharmacist if you have questions or concerns about your medicine," the agency adds.