If you take chlorthalidone for high blood pressure or fluid retention, it’s worth checking your bottle against a new nationwide recall. The FDA has classified a recall of certain chlorthalidone tablets as Class II, after the medication failed dissolution testing — meaning the pills may not break down and release their active ingredient properly once swallowed.
Key Takeaways
- Chlorthalidone tablets manufactured by Inventia Healthcare Limited and distributed by Rising Pharma Holdings failed FDA dissolution standards, and the recall has now been classified Class II.
- A dissolution failure means the tablet may not release its full dose properly in the body, which can leave blood pressure less controlled than expected — without the patient feeling any different, since high blood pressure itself typically has no symptoms.
- This is the second dissolution-related recall tied to this manufacturing line in recent months: an earlier recall in June 2026 covered 11,460 bottles (lots RISA24001 and RISB24002), and a follow-up in September 2026 covered another 13,500-plus bottles (lot RISA24002).
- Class II is the FDA’s middle risk tier — it means the product could cause temporary or medically reversible health effects, a real but not the most severe classification.
- If your bottle matches an affected lot, don’t stop taking your medication on your own — contact your pharmacist or doctor to arrange a replacement, since suddenly stopping a blood pressure medication carries its own risks.
What actually went wrong
Chlorthalidone is a thiazide-like diuretic — sometimes called a water pill — commonly prescribed for high blood pressure and for fluid retention (edema) related to heart, kidney, or liver conditions. Before a generic drug can be sold, it has to meet FDA dissolution standards, which test how completely and how quickly a tablet breaks down and releases its active ingredient once it reaches the body. When a batch fails that testing, as these lots did, it means there’s no guarantee the tablet is delivering its full, intended dose — which for a blood pressure medication translates into a real risk that a patient’s blood pressure isn’t as controlled as their prescription assumes.
Why this matters even without obvious symptoms
This is the detail worth taking seriously: uncontrolled or under-treated high blood pressure typically produces no noticeable symptoms. Someone taking an affected tablet wouldn’t necessarily feel anything different, even while their actual blood pressure control quietly worsens — and persistently elevated blood pressure raises the risk of heart attack, stroke, and kidney damage over time. That’s precisely why the FDA treats a dissolution failure in a blood pressure medication as a genuine Class II concern, even though it isn’t the kind of contamination or mislabeling that leads to the most severe recall classification.
The affected lots
- 100-count bottles: NDC 64980-599-01, batch RISA24001, expiration April 2027
- 1,000-count bottles: NDC 64980-599-10, batch RISB24002, expiration April 2027
- A separate, more recent batch: lot RISA24002, also 25 mg tablets, also expiring April 2027, covering more than 13,500 additional bottles
Both rounds were manufactured by Inventia Healthcare Limited and distributed nationwide in the U.S. by Rising Pharma Holdings. The fact that this is the second dissolution-related failure from the same manufacturing line within a few months is worth noting — it points to an ongoing quality-control issue at that facility rather than a one-time error.
What to do
Check your prescription bottle for the NDC number and lot number against the list above. If it matches, don’t simply stop taking chlorthalidone on your own — abruptly discontinuing a blood pressure medication can itself cause a dangerous rebound in blood pressure. Instead, contact your pharmacist or prescribing doctor, who can confirm whether your specific bottle is affected and arrange a replacement from an unaffected lot or manufacturer.
Sources: U.S. Food and Drug Administration, Class II recall enforcement records for chlorthalidone tablets (Inventia Healthcare Limited / Rising Pharma Holdings, Inc.).
This article is for informational purposes and isn’t a substitute for medical advice. If you take chlorthalidone, check your bottle against the lot numbers above and talk to your pharmacist or doctor before making any changes to your medication.