Any surgeon suggesting "liver cleanser pills" prior to liposuction is suspect as to training, experience, and ethics, since there is no such thing (medically-appropriate) as so-called "liver cleanser pills."
Is your surgeon an American Board of Plastic Surgery-certified plastic surgeon? I doubt it, since any of us who perform any form of liposuction (laser-assisted, power-assisted, ultrasonic, body jet, etc.) would not be selling snake oil remedies along with reputable surgery. I suggest that you ask just what type of residency training your "surgeon" has received, and if s/he is claiming "board certification," what board, since there are many doctors of various backgrounds who perform cosmetic surgical procedures who are "board-certified" by bogus boards NOT recognized by the American Board of Medical Specialties, or by boards that have little or nothing to do with plastic surgery and DO NOT require complete training in plastic surgery!
Perhaps your "surgeon" is playing on your very reasonable fears about prior abdominal surgery by selling you worthless pills, and also deflecting appropriate questions about performing laser liposuction in an area of prior surgery, scarring, with the potential for inadvertent damage to deeper structures.
Laser lipo is "safe" in and of itself, but any type of liposuction in a setting of prior abdominal surgery and scarring should be employed only by expert, skilled, and experienced hands (ABPS-certified plastic surgeon, not a Dermatologist who claims local anesthesia laser liposuction is "safer" than "regular" liposuction performed under "nasty general anesthesia") in a setting of expert general anesthesia so there is no movement or pain that could cause accidental perforation of the abdominal wall.
Your question set off so many "red alerts" in my mind I can hardly emphasize enough that it seems as if you are in the wrong hands! Please research your doctor's credentials carefully, and consider what my colleagues and I are suggesting here! Please click on the web reference link below for more information about sho is qualified to do this surgery. Best wishes. Dr. Tholen