Is marijuana bad for overactive bladder? What to do if it causes urinary urgency & inability to urinate?

THC and muscles. Marijuana has effects on muscle function - whether it be muscle function in organs such as the bladder or intestines, or skeletal muscles. That's why your reaction time is slower when you are doing a doobie. If you are having symptoms related to its use, you need to stop its use and if symptoms not improving in a few days, talk to doc about further testing and evaluation of more permanent damage.