Medication for incontinence?

First of all...let me say, my parents doctor has been good for nothing since they've gotten older...but they are toooo old to change doctors. My poor father pees in his pants regularly. He wears underwear with a pad in them and pajamas. He changes his wet underwear at least 6 times a day....and several times a night. He has a jar next to his bed because he can't make it to the bathroom. Several times I have spoken to his doctor about it...and all he does is cut his water pills down. THIS IS NOT WORKING! Isn't there some type of meds for prostrate that would cut down on this heavy dripping?