
Incontinence is most common in
older, spayed dogs. It is caused by a failure of the urethral sphincter
muscle to properly close the urine flow. It is unusual for a seven year
old to be incontinent, so you may wish to pursue the problem
diagnostically with you veterinarian, before trying sphincter control
medications. Phenylpropanolamine (PPA) is a common, over the counter
medication, found in diet pills, and decongestant tablets. Prolonged or
high dose usage can cause dry sinuses, leading to nose bleeds, and
weight loss. The nerves and muscles this medication was acting upon may
have built up temporary resistance. I recommend trying this medication
again after a two to three month break. Also, PPA works only for a
brief few hours after ingestion, so it often works best dosing a
critical times of the day, rather than a routine of every eight hours.
You should work closely with your veterinarian for dosing assistance,
however at 50 mg, most shepherds are able to take higher amounts. PPA
is a very safe medicine, and much preferred over the Estrogen's for
urinary control problems. You may be able to approach the problem
behaviorally, by training her to go outside frequently, or give her
urinary pads to use.