I would like to hear what side effects others have while taking Mestinon. I'm not sure if I was prescribed this medication for the right reason. ## I have Myasthenia Gravis and, have been on it since 1999. It helps my muscles through out the day and, also my eyes. I don't know what you are taking it for....Side effects esp. when you just start it is having to go to the bathroom a lot, then it tends to go away after getting adjusted to it. It may make you groggy, it just depends on the person...and, reason taken. I used to live in Concord, California but now live in Clovis, New Mexico and, miss the area Hope to hear from you. Sincerely, Kathy Lynne Cook ## Mestinon contains the active ingredient Pyridostigmine, it is used to reverse the effect of some anesthetics after surgery, a...