PROIN® (phenylpropanolamine hydrochloride) is for the control of canine urinary incontinence due to urethral sphincter
hypotonus.Urethral sphincter hypotonus causes canine urinary incontinence as a result of weakened muscles of the urethral
sphincter. Formulated as a liver-flavored tablet to help make dosing easier. 50mg tablets, 180/Bottle.