Why Is Chlorthalidone/Clonidine (Clorpres) So Hard to Find? [Explained for 2026]

If you've been trying to fill a prescription for Clorpres — the brand name for the chlorthalidone/clonidine combination tablet — and coming up empty at every pharmacy, there's a straightforward explanation: the medication has been discontinued in the United States. This isn't a temporary shortage. Both the brand-name Clorpres and all generic versions of the chlorthalidone/clonidine fixed-dose combination have been pulled from the US market.

The good news: the discontinuation was not due to any safety concerns or problems with how well the drug works. And both of the individual components — clonidine and chlorthalidone — remain available as separate generic medications. This guide explains what happened, what it means for patients, and how to stay on track with your blood pressure treatment.

What Is Chlorthalidone/Clonidine (Clorpres)?

Clorpres was a fixed-dose combination tablet that paired two antihypertensive medications into a single pill: clonidine hydrochloride (a centrally acting alpha-2 adrenergic agonist) and chlorthalidone (a thiazide-like diuretic). It was available in three strengths: 0.1 mg/15 mg, 0.2 mg/15 mg, and 0.3 mg/15 mg of clonidine/chlorthalidone.

The combination was FDA-approved specifically for the treatment of hypertension — but not as an initial therapy. It was prescribed only for patients who had already been individually titrated on both clonidine and chlorthalidone and found the fixed-combination dose to be appropriate. The single-pill format offered a convenience benefit for medication adherence.

Why Was Clorpres Discontinued?

The exact reason for Clorpres's discontinuation has not been publicly disclosed by the manufacturer. According to GoodRx, the medication was not taken off the market because of any issues related to safety or effectiveness. Market dynamics — such as low commercial demand, manufacturing economics, and the widespread availability of inexpensive individual generics — are the most likely drivers behind such decisions for older combination drugs.

Clorpres was considered an older, second-line antihypertensive option. Modern hypertension guidelines — including the 2025 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults — favor ACE inhibitors, ARBs, long-acting calcium channel blockers, and thiazide-type diuretics as first-line agents. The combination of clonidine and chlorthalidone, while effective, doesn't align with current first-line prescribing patterns.

Is There a Generic Version Available?

No. As of 2026, there is no generic version of the chlorthalidone/clonidine fixed-dose combination tablet available in the United States. Both the brand-name Clorpres and any generic equivalents have been discontinued. If you see listings online for this medication, they reflect discontinued products.

What Can Patients Do Now?

If you were previously on Clorpres, the most practical path forward is to work with your prescriber to transition to the individual components. Both generic clonidine and generic chlorthalidone are widely available at pharmacies across the US — and when taken together, they provide the same therapeutic effect as the combination pill. Here's what to know:

Generic clonidine tablets (0.1 mg, 0.2 mg, 0.3 mg) are widely available at most pharmacies from multiple generic manufacturers.

Generic chlorthalidone tablets (25 mg, 50 mg) are also widely available as standalone generics, listed as a first-line thiazide-like diuretic in the 2025 ACC/AHA guidelines.

Your doctor can write two separate prescriptions to replace the single Clorpres tablet. The doses in Clorpres ranged from 0.1–0.3 mg clonidine combined with 15 mg chlorthalidone.

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The Critical Warning: Never Stop Clonidine Abruptly

This is the most important thing to know if you're having trouble finding your medication. Clonidine carries a black box warning about abrupt discontinuation. Stopping clonidine suddenly — or even missing several doses — can cause rebound hypertension: a rapid, dangerous spike in blood pressure that can lead to a heart attack or stroke. If you're running low on medication and can't fill your prescription, contact your prescriber immediately. Do not wait until you run out.

How medfinder Can Help

While the combination pill is discontinued, patients transitioning to individual clonidine or chlorthalidone generics may still face localized stock gaps at specific pharmacies. medfinder can help you find which pharmacies near you have your new individual prescriptions in stock, saving you calls and wasted trips across town.

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What Are the Alternatives to Clorpres?

Beyond taking the individual components separately, there are several other antihypertensive approaches your doctor may consider. For a full breakdown of what patients can switch to when Clorpres is unavailable, see our guide to alternatives to Chlorthalidone/Clonidine.

ACE inhibitors + diuretic combinations (e.g., lisinopril/HCTZ) — first-line per current guidelines, widely available.

ARB + calcium channel blocker combinations (e.g., amlodipine/valsartan) — excellent tolerability and proven outcomes.

Guanfacine — another centrally-acting alpha-2 agonist similar to clonidine, with less rebound risk.

Bottom Line

Clorpres (chlorthalidone/clonidine) is not available in the US in 2026 — and that won't change. The combination pill has been permanently discontinued, not temporarily out of stock. However, patients can continue their therapy without interruption by transitioning to the two individual generic components. Talk to your prescriber promptly — especially given the serious risks associated with stopping clonidine abruptly. Both generic clonidine and generic chlorthalidone remain affordable, accessible, and highly effective.