U.S. Blood Pressure Medication Recall Shocker: 25,000 Bottles Fail Dissolution Tests—Is Your Medication Safe?

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The Blood Pressure Medication You Took Every Day, a Warning Hidden in the Bottle: FDA Chlorthalidone Dissolution Testing Recall

A bottle of blood pressure medication with no unusual smell or change in color has been recalled across the United States. The drug is a generic version of chlorthalidone 25 mg, widely used to treat high blood pressure and edema.

The key issue in this FDA chlorthalidone dissolution testing recall is not that the medication looks unusual. It failed to meet standards in dissolution testing, which checks whether a tablet dissolves properly within a specified time in the body and releases its active ingredient.

In June and September 2026, the U.S. FDA classified certain chlorthalidone 25 mg products manufactured by India’s Inventia Healthcare and distributed by Rising Pharma as Class II recalls. Together, the two recalls involve more than 25,000 bottles.

One important point: not all chlorthalidone products are affected. The drug name alone is not enough to identify recalled products. Check the manufacturer and distributor information on the bottle label, as well as the NDC number, lot number, and expiration date.

The main products identified in the recall notices are:

• Ingredient and strength: Chlorthalidone Tablets, USP 25 mg
• NDC: 64980-599-01
• Manufacturer: Inventia Healthcare Limited
• Distributor: Rising Pharma
• Affected lot numbers: RISA24001, RISB24002, RISA24002
• Main expiration date: April 2027 (04/2027)

The reason this recall may cause concern is not that the medication has been found to be “contaminated with a toxic substance.” The concern is that if some tablets do not dissolve as expected, the active ingredient may not be absorbed adequately, potentially reducing the medication’s blood-pressure-lowering effect.

In high blood pressure treatment, a medication that “works a little less well” is not something to take lightly. Blood pressure can rise without noticeable symptoms, and over the long term, managing it is also linked to the risk of stroke and cardiovascular disease. That said, the FDA’s Class II classification means the agency considers the likelihood of serious or permanent harm to health to be low.

So, even if your medication may be part of the recall, do not stop taking it immediately. Suddenly discontinuing blood pressure medication can make your blood pressure unstable. The safest course is to check the bottle label first and, if your product is from an affected lot, contact your pharmacist or prescribing doctor to discuss whether to switch to a replacement medication or a product from another manufacturer.

Two Recalls, More Than 25,000 Bottles Recalled: FDA Chlorthalidone Dissolution Testing Recall

The first recall involved about 11,460 bottles. Just a few months later, another 13,567 bottles of a product containing the same active ingredient from the same manufacturer were recalled. That brings the total to more than 25,000 bottles—and helps explain why this FDA chlorthalidone dissolution testing recall doesn’t look like a one-time manufacturing error.

June Recall: 11,460 Bottles Recalled

On June 5, 2026, Inventia Healthcare voluntarily recalled certain lots of chlorthalidone 25 mg. The FDA classified it as a Class II recall on June 22.

• Lots affected: RISA24001, RISB24002
• Packaging: Bottles of 100 and 1,000 tablets
• Recall size: Approximately 11,460 bottles
• Reason: Failed dissolution specifications

The key issue was that the product failed a dissolution test, which checks whether the medicine dissolves sufficiently and releases its active ingredient within a specified time.

September Recall: Another 13,567 Bottles

Even after the first recall, a problem involving another lot in the same product line was identified. Inventia Healthcare initiated a second voluntary recall on September 3, and the FDA again classified it as Class II on September 17.

• Lot affected: RISA24002
• Packaging: Bottles of 100 tablets
• Recall size: 13,567 bottles
• Recall number: D-0852-2026
• Reason: Again, failed dissolution specifications

The second recall involved a lot separate from the one in the first incident. This makes it more than a problem with a single bottle and raises the need to examine the manufacturer’s production and quality-control processes for chlorthalidone 25 mg.

What Do Repeated Dissolution Issues Mean?

Neither recall involved the discovery of toxic substances or contamination. However, if the medicine does not dissolve as expected in the body, it may not lower blood pressure as effectively as intended.

Hypertension is a chronic condition that can become harder to manage even when it causes no obvious symptoms. So, regardless of the Class II classification—which indicates that the likelihood of serious harm is low—repeated quality issues are not something patients and healthcare providers should dismiss.

That said, based on the information currently available, it is not possible to determine how many patients actually experienced worsening blood pressure or other health effects. A recall is a response to the possibility that a product did not meet quality standards; it does not mean the medicine was ineffective for everyone who took it.

What to Check

If you take Chlorthalidone 25 mg, NDC 64980-599-01, and the manufacturer or distributor information lists Inventia Healthcare or Rising Pharma, check the lot number on the bottle.

• RISA24001
• RISB24002
• RISA24002

If your medicine is from one of these lots, do not stop taking it on your own. Contact your pharmacist or prescribing clinician first to ask about a replacement product and whether your prescription needs to be changed.

FDA Chlorthalidone Dissolution Testing Recall: Does “Failing a Dissolution Test” Mean the Medication Didn’t Dissolve?

A pill’s job isn’t over the moment you swallow it. As it moves through your digestive tract, it must dissolve and release a specific amount of its active ingredient within a set time so the body can absorb it and the medication can work. That process is at the heart of the FDA chlorthalidone dissolution testing recall.

What Is Dissolution Testing?

Dissolution testing is a quality check that measures how quickly and how completely a tablet dissolves under conditions that resemble those inside the body. It’s not simply a test to see whether a pill dissolves in water.

The test typically checks:

• How much of the active ingredient is released within a set time
• Whether the release rate meets the product’s approved specifications
• Whether quality varies between batches enough to affect the medication’s effectiveness

In other words, even if a medication contains the 25 mg stated on its label, its expected blood-pressure-lowering effect could be reduced if the active ingredient doesn’t dissolve and get absorbed in the body in time.

It Doesn’t Mean the Medication “Doesn’t Dissolve at All”

The phrase “failed a dissolution test” can make a medication sound as if it won’t dissolve at all or is immediately dangerous. But it’s important to understand more precisely what this recall means.

The affected products are batches that did not meet the permitted dissolution-rate or amount-released standards. In other words, some tablets may not have released enough of their active ingredient within the specified time.

So it’s important to distinguish between two things:

• It does not mean the medication was ineffective for everyone who took it.
• It does mean that the medication’s effectiveness may not have been consistent in certain batches, making it difficult to continue distributing them while meeting quality standards.

That uncertainty matters in high blood pressure treatment. Blood pressure medication needs to be taken consistently to manage blood pressure, even when there are no noticeable, immediate symptoms.

How Could This Affect Blood Pressure Control?

Chlorthalidone is a diuretic that lowers blood pressure and helps the body eliminate excess water and sodium. If a tablet doesn’t dissolve as expected, the body may not absorb enough of its active ingredient.

As a result, some patients may experience:

• Blood pressure that is less well controlled than usual
• A gradual increase in blood pressure readings
• Reduced overall treatment effectiveness, even when taking other blood-pressure medications
• Greater difficulty managing long-term cardiovascular risk in people at high risk of complications from high blood pressure

However, the recall information alone does not tell us how much patients’ blood pressure may actually have changed or which patients were most affected. It’s more appropriate to understand this action not as confirmation of a toxicity or contamination problem, but as a quality issue that makes it difficult to ensure predictable medication effectiveness.

The key point is not that “the medication doesn’t dissolve at all,” but that “there is no guarantee it dissolves consistently enough to meet the specified standard.”

Why Was the Recall Classified as Class II?

The FDA classified this chlorthalidone recall as Class II. This category applies when temporary or medically reversible health effects are possible, but the likelihood of serious harm is considered low.

In other words, this is not the kind of recall involving exposure to a toxic substance or an emergency poisoning risk. But for people who depend on blood-pressure control, the possibility of reduced effectiveness should not be dismissed. Check whether your medication is affected and discuss how to switch it with a healthcare professional.

If You’re Taking Medication Included in the Recall

Check the bottle label for the ingredient, NDC number, manufacturer or distributor, and lot number. If you think your medication may be included in the recall, don’t stop taking it on your own. Contact your pharmacist or prescribing doctor first.

Stopping blood-pressure medication suddenly can make your blood pressure unstable. Your healthcare professional can consider your blood pressure and other medications and recommend the same ingredient from another manufacturer or an appropriate alternative treatment.

A Class II Recall: Reading the Warning Signs Between Fear and Reassurance: fda chlorthalidone dissolution testing recall

The FDA classified this fda chlorthalidone dissolution testing recall as a Class II recall, not the highest warning level, Class I. That distinction matters. It means there is no indication of an immediate threat to life, toxic contamination, or a potentially fatal adverse effect.

But “not severe” should not be taken to mean “safe to ignore.” The core issue is that the medication may not dissolve in the body as expected, which could mean that not enough of its active ingredient is absorbed. With blood pressure medication, even a small difference like this could, over time, create gaps in blood pressure control.

Bottom line: Patients should not stop taking a recalled medication on their own.
First, contact a pharmacist or prescribing clinician to find out how to switch to an alternative medication or a product from another manufacturer.

What does a Class II recall mean?

The FDA classifies a recall as Class II when use of or exposure to a product could cause temporary or medically reversible health problems. By contrast, the risk of serious outcomes such as death or permanent disability is considered low.

In the case of this chlorthalidone recall, that means:

• It does not mean the medication is contaminated with a toxic substance.
• It does not mean that every tablet is ineffective.
• However, some products may not meet dissolution standards, so they may not provide the expected blood pressure-lowering effect.
• Patients who take the medication long term should check with their healthcare provider to make sure their blood pressure remains at its target level.

“Low risk of a life-threatening outcome” and “risk of reduced effectiveness” can both be true

High blood pressure is a chronic condition that can put strain on the blood vessels, heart, and kidneys even when it causes no symptoms. So while a slight reduction in a medication’s effectiveness may not cause any obvious problems in the short term, it could affect treatment goals over time.

For example, if your blood pressure has recently risen after being consistently stable, or your home readings have been trending upward, it may be worth checking the manufacturer information on your medication—not just considering changes in your lifestyle.

That said, a recall notice alone cannot determine why a particular patient’s blood pressure has increased. Stress, weight changes, salt intake, other medications, and missed doses can all affect blood pressure. The key is not to let worry take over, but to start by checking the information you can verify.

If your medication is included in the recall, take these steps

1. Check the label on your medication bottle.
   Confirm whether it is chlorthalidone 25 mg, and check whether the NDC and lot/batch numbers match those included in the recall.

2. Do not stop taking it on your own.
   Suddenly stopping blood pressure medication may cause your blood pressure to rise again or lead to a dangerous hypertensive episode.

3. Contact your pharmacist or prescribing clinician.
   They can confirm whether your medication is affected and, if needed, help you switch to the same active ingredient from another manufacturer or to an appropriate alternative treatment.

4. Share your recent blood pressure readings.
   Tell your healthcare provider your home readings and whether you have symptoms such as a headache, chest pain, or vision changes. This can help them make a more informed decision.

A Class II recall is less a reason to panic than a warning light prompting you to recheck your medication’s quality and how well your blood pressure is being managed. By confirming whether your medication is affected and working with your healthcare provider to plan a switch, you can respond safely without stopping treatment unnecessarily or becoming unduly alarmed.

A 5-Minute Checklist to See If Your Medication Is Affected: fda chlorthalidone dissolution testing recall

This fda chlorthalidone dissolution testing recall does not affect “everyone taking chlorthalidone.” It applies to products with specific manufacturing and distribution details and lot numbers. In most cases, you can check whether your medication is affected in five minutes by looking at the label on the bottle.

What to check on the bottle

Check whether all or most of the following details match:

• Ingredient and strength: Chlorthalidone Tablets, USP 25 mg
• NDC number: 64980-599-01
• Manufacturer: Inventia Healthcare Limited
• U.S. distributor: Rising Pharma
• Lot/Batch numbers:
  
  • RISA24001
  • RISB24002
  • RISA24002
• Expiration date: Mainly 04/2027 or April 2027

For bottles containing 100 tablets in particular, check both the NDC and lot number. The initial recall included bottles of 100 and 1,000 tablets; the second recall applies to specific lots in 100-tablet bottles.

What to do if your medication is affected

The most important rule is simple: Do not stop taking your medication abruptly on your own.

Chlorthalidone is a diuretic used to manage blood pressure and fluid levels. Even if your product is affected by the recall, stopping it without medical advice may cause your blood pressure to rise suddenly or disrupt management of your existing condition.

The safest approach is to follow these steps:

1. Take a photo of the bottle or keep it.
   Make sure the NDC, lot number, and expiration date are visible.

2. Contact your pharmacy or prescribing healthcare professional.
   You can say: “I’d like to check whether my 25 mg chlorthalidone, manufactured by Inventia Healthcare and distributed by Rising Pharma, has a recalled lot number.”

3. Ask about a replacement medication.
   Your healthcare professional may switch you to chlorthalidone from another manufacturer or suggest another treatment option based on your blood pressure, kidney function, and other medications.

4. Check your recent blood pressure readings.
   If your readings are higher than usual, or you have symptoms such as a headache, chest pain, shortness of breath, or vision changes, contact your healthcare professional promptly. Severe chest pain, neurological symptoms, or difficulty breathing may require emergency evaluation.

If you can’t find the label

You may have transferred your medication to a pill organizer and no longer have the original bottle, or you may not know who manufactured it. In that case, contact the pharmacy that filled your prescription and provide the fill date and prescription number. The pharmacy can use its dispensing records to check the manufacturer, NDC, and lot information.

This recall is not something to dismiss as simply “one defective bottle.” Dissolution testing—which checks whether a tablet dissolves sufficiently within a specified time—is a key quality standard for ensuring consistent medication performance. What patients need is not to stop taking their medication out of fear, but to check the label carefully and promptly contact a pharmacist or healthcare professional.