You don't mention if you have any personal health issues. If so, a visit to your primary physician is advisable to assure any health problems are properly managed.
Your surgeon will provide a list of medicines to avoid, most of which can interfere with blood clotting and therefore cause bleeding. Aspirin is the commonest one that is an issue and should be avoided for at least 10 days. Motrin is a problem, but less so. (Tylenol is ok.)
Prescription anticoagulants should be managed by your surgeon along with the prescribing doctor.
Remaining at a realistic weight is important if fat grafting is part of the plan
All the best.