Although alpha-adrenergic agonists, a class of drugs found in some over-the-counter cold medicines, aren't specifically designed to treat incontinence, some people may find these medications helpful in relieving symptoms of incontinence. The drugs seem to stimulate the muscles around the bladder neck and urethra to contract and form a tighter seal to keep urine in. A number of prescription medications are available that increase sphincter or pelvic muscle strength or relax the bladder, making it able to hold more urine. Medications are prescribed for all kinds of incontinence, but they are generally most helpful for urge incontinence.
For more information, see:
Urinary Incontinence Medications: To Take or Not to Take?
Be sure to talk with your doctor before taking any medications. Best of luck. - MG