Hello Thank You for contacting HCM. Welcome to Health Care Magic. My name is Dr Muhammad Ahmad & i will look into your problem. I have gone through your query and would try to help you in the best possible way. In my opinion: Before ,after and during the procedure you have mentioned above doctors usually suggest opiods, anxiolitis and meds like them to relieve you both from pain and mental stress in order to control to control panic attacks,pain attacks,anxiety and eventually fluctuations in blood pressures. As you mentioned that you are weaning off these medications ,it is a natural part of set of with drawl symptoms from opioids. SUGGESTIONS: If i were your doctors i would have suggested you a proper system of weaning off the drugs to ensure minimal with drawl symptoms along with ONDENSETRON-8mg this is a WHO enlisted drug which is best known to control vomiting post surgery and chemotherapy other drugs like metoclopramide can also be used. This can Also be side Effect of drugs which you are taking know which seems to be lesser a possibility as you are reducing their intake for them as well same meds i mentioned above help much.Mostly the patient gets good results. Hope this answers your question. If you have additional questions or... follow up questions then please do not hesitate in writing to us. Wishing you good health..!!