If you take medication for high blood pressure, this is one recall worth checking carefully.
More than 13,000 bottles of chlorthalidone, a prescription medication commonly used to treat high blood pressure and fluid retention, are being recalled across the United States after the tablets failed an important quality-control test related to how they dissolve.
The manufacturer, Inventia Healthcare Limited, initiated the recall on September 3, 2026, and the U.S. Food and Drug Administration later classified it as a Class II recall on September 17.
The recall does not involve every chlorthalidone prescription.
Only one specific batch is affected.
Here is what patients should know before making any changes to their medication.
Which Blood Pressure Medication Is Being Recalled?
The affected product is:
- Chlorthalidone Tablets, USP
- Strength: 25 mg
- Bottle size: 100 tablets
- NDC: 64980-599-01
- Batch number: RISA24002
- Expiration date: 04/2027
- Manufacturer: Inventia Healthcare Limited
- Quantity affected: 13,567 bottles
The medication was distributed nationwide in the United States.
If you take chlorthalidone but your bottle has a different batch number, that does not automatically mean your medication is part of this particular recall.
Why Was Chlorthalidone Recalled?
According to the recall information, the tablets failed dissolution specifications.
That phrase sounds technical, but the idea is relatively simple.
Before a tablet reaches the market, manufacturers test how reliably the medication releases its active ingredient after it comes into contact with fluid.
A tablet doesn’t merely need to contain the correct amount of medicine.
It also needs to release that medicine properly.
If a tablet dissolves more slowly, incompletely, or inconsistently than expected, the amount of medication available for absorption may not match what was intended.
That can potentially make treatment less reliable.
In the case of a blood pressure medication, reduced or inconsistent drug release could theoretically mean blood pressure isn’t controlled as effectively as expected.
The FDA recall information lists the reason simply as failed dissolution specifications.
What Is Chlorthalidone?
Chlorthalidone is a prescription thiazide-like diuretic, sometimes casually called a “water pill.”
It helps the kidneys remove additional sodium and water from the body.
That reduction in fluid volume can lower pressure inside the blood vessels, which is why chlorthalidone is frequently prescribed for hypertension.
It may also be used to reduce fluid buildup, or edema, associated with certain health conditions.
Unlike a medication people might take temporarily for a headache or infection, blood pressure medication is often taken every day for years.
That makes reliable dosing particularly important.
What Does a Class II Recall Mean?
The FDA categorizes recalls according to the potential health risk.
A Class II recall means exposure to the affected product could cause temporary or medically reversible health consequences, while the probability of serious health consequences is considered remote.
In other words, it is important enough to remove the affected product from circulation, but it is not the FDA’s highest-risk recall category.
That distinction is important.
Seeing the word “recall” can understandably make people want to throw their medication away immediately.
But blood pressure treatment is one area where abruptly stopping medication can create its own risks.
Should You Stop Taking Chlorthalidone Immediately?
Do not automatically stop a prescribed blood pressure medication simply because you heard about the recall.
First determine whether your medication actually belongs to the recalled batch.
If your bottle matches the recalled product information, the appropriate next step is to contact the pharmacy that filled the prescription or the clinician managing your blood pressure treatment.
A pharmacist can often confirm the manufacturer, NDC and lot information associated with your prescription and arrange a replacement when necessary.
Stopping treatment without an alternative could allow blood pressure to rise again.
And because high blood pressure frequently causes no obvious symptoms, someone may feel perfectly normal even when their readings are increasing.
How to Check Your Bottle
Take your prescription bottle and look for the identifying information.
The most important details are:
Drug: Chlorthalidone
Strength: 25 mg
NDC: 64980-599-01
Batch: RISA24002
Expiration: 04/2027
If all of those match, contact your pharmacy.
If you cannot find the batch number on your prescription label, that is not unusual.
Pharmacies generally maintain dispensing records and may be able to identify which manufacturer’s product and lot was supplied.
This is particularly useful if you already transferred your tablets into a pill organizer.
Why Medication Dissolution Matters More Than Many People Realize
When we think about medication quality, most people imagine contamination or the wrong ingredient.
But pharmaceutical quality involves much more.
A tablet has to meet standards for:
- identity
- potency
- purity
- uniformity
- stability
- and dissolution
Imagine two tablets containing exactly the same amount of active ingredient.
One releases the medication predictably after you swallow it.
The other releases it too slowly or incompletely.
On paper, both tablets technically contain the same dose.
Inside the body, however, their effects may not necessarily be identical.
That is why dissolution testing is such an important part of pharmaceutical quality control.
This Isn’t the First Chlorthalidone Recall This Year
The September recall follows another chlorthalidone recall involving Inventia Healthcare earlier in 2026.
In June, more than 11,000 bottles of 25 mg chlorthalidone tablets were recalled, also because of failed dissolution specifications.
The newer September recall concerns a different batch—RISA24002.
That means someone who checked their medication during the earlier recall should not automatically assume a newer prescription is unaffected.
If you have refilled chlorthalidone since then, it is worth checking the current bottle again.
What If Your Blood Pressure Starts Rising?
If someone receives an affected batch that does not release medication as intended, reduced effectiveness could potentially result in poorer blood pressure control.
Anyone taking medication for hypertension should already know their usual blood pressure range.
Home blood pressure monitoring can be useful for spotting unusual changes.
A single slightly elevated reading doesn’t necessarily mean something is wrong. Blood pressure naturally fluctuates with stress, sleep, activity, caffeine and other factors.
But repeated readings that are significantly higher than normal deserve attention.
Seek urgent medical care for extremely high blood pressure accompanied by concerning symptoms such as:
- chest pain
- severe shortness of breath
- confusion
- severe headache
- weakness or numbness
- vision changes
- fainting
These symptoms should not be ignored while waiting to resolve a medication recall.
Can Natural Remedies Replace a Recalled Blood Pressure Drug?
This is another important point.
Garlic, hibiscus tea, potassium-rich foods, exercise, adequate sleep, weight management and a diet rich in vegetables may all be useful parts of a heart-healthy lifestyle.
But they are not an immediate one-for-one substitute for a prescribed antihypertensive medication.
Lifestyle strategies generally work gradually and their effects vary significantly from person to person.
If a prescription is recalled, the appropriate solution is usually to obtain an unaffected replacement or an alternative medication—not to leave hypertension untreated.
Natural approaches are best viewed as part of a broader blood-pressure-supportive lifestyle rather than an emergency substitute for prescribed treatment.
What Can You Do Today?
If you take chlorthalidone, spend two minutes checking your bottle.
Look for:
25 mg + NDC 64980-599-01 + batch RISA24002 + expiration 04/2027.
If those details match, contact your pharmacy and ask whether your prescription is part of the recall.
Keep track of your blood pressure while the issue is being resolved.
And perhaps most importantly, don’t panic.
A recall does not necessarily mean that everyone who took the medication will experience harm.
The purpose of medication recalls is to identify products that fail established standards and remove them before a potential quality problem becomes a larger health issue.
The Bottom Line
More than 13,500 bottles of chlorthalidone 25 mg are being recalled nationwide because the tablets failed dissolution testing.
The affected batch is RISA24002, with NDC 64980-599-01 and an expiration date of April 2027. The FDA has categorized the action as a Class II recall.
Only the specified batch is involved.
If your medication matches the recall information, contact your pharmacist or prescribing clinician about a replacement rather than abruptly discontinuing treatment.
And if you know someone who takes medication for high blood pressure, this may be worth sharing with them.
A quick look at a prescription bottle could prevent unnecessary confusion—and help ensure that treatment continues working as intended.
