Oxybutynin
"Have been taking this medicine now for 3 months. I take 5 mg in the morning and works ok, generally lasting approximately 3-4 hours before I need the toilet of which I can easily deal with. However at night is a different story. I doesn't work at all. I have taken the medicine at various times prior to going to bed but it has no effect. I am still getting up 2-3 times a night. So it's a trip back to the Doctors."