Hello and thank you for your question regarding drugs used in general anesthesia for gynecomastia and tummy tuck surgery. There are several drugs used for general anesthesia. Each drug has a particular role. Each anesthesiologist also has a particular recipe with which they are comfortable. The following list is the drugs most commonly used to achieve comfortable and safe general anesthesia. Propofol is medication given at the beginning of the procedure to make you sleepy. This is an induction agent. Cis-atracurium (Nimbex), Vecuronium, Rocuronium, Succinyl choline are paralytic agents. These allow your entire body to relax. This also allows placement of the breathing tube between your vocal chords. Sevo-flurane is a hypnotic medication and allows for deep sleep during surgery. Nitrous oxide, Fentanyl, and Dilaudid are analgesic medications. These medications minimize the pain during surgery. Glycopyrolate and Atropine are medications given to decrease oral secretions and to protect your airway. Oral secretion can block your airway and restrict breathing. Versed is a medication to help you relax and forget some of the procedure. Neostigmine is a reversal agent. This medication is given at the end of the case to fully awaken you. If you are in good health with normal blood test, EKG, and chest x-ray, general anesthesia is relatively safe. If you are healthy, it is safe to have multiple surgeries in a single day. Most plastic surgeons try to limit the hours under anesthesia. In general I believe it is safe to do male breast reduction and full tummy tuck on the same day. I believe it is probably less risky to perform these procedures on a single day as opposed to separating the procedures on different days. Performing the procedures on different days may increase anesthetic risks. To a certain extent, general anesthesia does affect the liver, kidneys, and heart. Some medications are processed by the liver, while others are processed by the kidneys. However, most general anesthetics are extremely short acting and pass through your system very quickly. The general anesthetics used today have minimal temporary effect on the kidneys and liver. Good luck. If you have any questions regarding male breast reduction and full tummy tuck, please contact my office. Sincerely, Dr. Katzen.