Urinary incontinence means a dog leaks urine without intending to. It is different from frequent urination, house-training problems, or straining to urinate. The right treatment depends on the cause.
Common causes
One of the most common causes in spayed female dogs is urethral sphincter mechanism incompetence. Other causes include urinary tract infection, bladder disease, neurological problems, congenital abnormalities, prostate disease, and conditions that increase urine production.
Phenylpropanolamine
Phenylpropanolamine, often called PPA, increases urethral tone and is commonly used for sphincter-related incontinence. It can be effective, but it is not appropriate for every dog and may affect blood pressure or cause other side effects.
Estrogen-based therapy
Some spayed female dogs respond to estrogen therapy. Estriol is one option used for urethral sphincter incompetence. Dosing is individualized to use the lowest effective amount.
Other treatment options
Dogs that do not respond adequately to one medication may sometimes receive combination therapy or be referred for additional testing and procedures.
Why a urine test matters
A urinary tract infection can worsen leaking and may look like incontinence. Urinalysis and sometimes urine culture help rule this out before long-term medication is started.
When leaking is not simple incontinence
Increased thirst, large urine volumes, weakness in the back legs, straining, blood in the urine, or pain may point to another condition that needs a different workup.
Monitoring
Dogs on long-term incontinence medication should be monitored for effectiveness and side effects. Your veterinarian may adjust the dose over time.
The bottom line
Most dogs with sphincter-related urinary incontinence can be helped, but treatment works best after infection and other causes of urinary leakage have been ruled out.
Sources
- Merck Veterinary Manual: Urinary incontinence in dogs
- Veterinary internal medicine guidance on urethral sphincter mechanism incompetence
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.