How long before and after a tummy tuck can recreational drug use be resumed?

 I doubt you are ever going to get any doctor to "allow" you to use recreational drugs.  At any point. Too much liability involved with that.

I agree. No physician will sanction drug use.  Each drug has a different half time, or time when the effects remain in the system. Some are cumulative. As for smoking cigarettes, this should be stopped at least eight weeks prior to surgery and not resumed at all or for a considerable time period afterwards.  Abdominoplasty involves a long scar nicotine can affect scar healing for months to come.