Oh, yes, many medications that help.
First thing is for your doctor to find out exactly what you have and what is the best course of medication.
Actually, the sedations they give me is much like laughing gas in that you are really not sleeping but they give me Versid which is that drug that keeps you from remembering. Yes, some have had the scope without sedation but I personally don't want that. Be sure to tell your concerns to your doctor and he will explain your options.
You are going to a gastro doctor, right? First thing mine gave me was a sample probiotic which helped firm up my stool and improve the diarrhea. Then I tried many medications - some helped, some didn't and some I am allergic to. You need to fine out what is going on and treat it accordingly. Be sure to get copies of your scope reports, etc. Read this forum and you will learn a lot.