Now there are many ways to treat glaucoma, including eye dropsj, drugs and laser surgery. While eye drops should be the first choice for patients as well as the doctor when treat glaucoma. There are various types of glaucoma eye drops. Different eye drops fits different person. No drops or medicine is suitable for all people. If your ophathalmologist prescribe the eye drops to you, then you can use it, and you should use it according to what the doctor told you. If you didn't use it, or you just used it occasionally, you should tell your doctor honestly. If one medicine is effective to your condition, then it probably brings some side effects with it. Different drops can cause different side effects. It is hard to give you a full introduction. The mainly side effects caused by drops include asthma, dizzy, ankle swelling, tired and nausea and so on. Yet you have to believe that the doctor prescribed this medicine for you, he/she must have leverage the benefits versus side effects. So you don't need to worry too much. Once you got any uncomfortable feelings, talk to your doctor at once for help.