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Once-a-day PROIN ER™

(phenylpropanolamine hydrochloride extended-release

PROIN ER is the only FDA-approved treatment of urinary incontinence (UI) due to urethral sphincter hypotonus in a convenient once-a-day tablet.

The controlled release mechanism in our patented extended-release technology maintains steady absorption throughout the day. Plus, the delicious tablets make dosing compliance easy.

Once-A-Day-Dosage | Available in 30 ct. & 90 ct. bottles

The PROIN ER advantage

1x per day

One extended-release tablet per day can be conveniently given with food.

Accurate dosing

Available in four weight-based strengths for accurate dosage of virtually any sized dog weighing 10 pounds or more. See prescribing information for details.

Enticing Flavor

Chewable, delicious tablets improve compliance and make treatment easy.

Steady absorption

Patented extended-release technology provides controlled release that ensures steady absorption.


The only once-a-day, FDA-approved medication for the control of urinary incontinence due to urethral sphincter hypotonus in dogs.

Convenient packaging

30 ct. & 90 ct. bottles are conveniently sized for storage and dosing.