The long answer: it depends on the patients medical history, smoking status, and overall fitness.
In a young individual, combining breast reduction with liposuction of about 2000-3000 cc does not necessarily increase operative risk by a large magnitude. However, if the patient has some underlying medical problems, is not physically fit, or has excessively large breasts (which can take a longer time to complete), or has a lot of volume for liposuction, then it would be best to stage the procedures.
Do one first, then do the second one at a later date. This will keep the overall surgical risk at a lower level. This is an excellent conversation for you to have with your plastic surgeon. I'm not sure which category you fall under, but hopefully your plastic surgeon has given you a lot of good information about your risk level. Good luck.
