You are 20 yrs. Weigh 95 kg. Height 1.7m. Your BMI is 32 which is very high and on obese side. Your articulation and writing skills are too good for someone taking antipsychotic medications and the medications you are taking are for Schizophrenia illness. Tab. Sizopin ii's the one that can cause weight gain. But it is best for the illness. Coming to your dilemma, do you really need the surgery. Unless you want to lead an active life in sports, the ACL repair can be managed conservatively by strengthening your knee muscles with appropriate knee exercises and physiotherapy. ACL repair at this young age would lead to arthritis at early age as well. Coming to your weight issues, unless you reduce your BMI to below 25-27 and want to lead an active sportive life, I would suggest you to avoid surgery. Luramax and Aripiprazole need not be stopped during surgery but yes Sizopin requires constant monitoring by ECG, CBP for leutrophil counts depending on the dose. Hence avoided during surgery.

As such there is no direct impact of medicine on surgery or vice versa. But couple of things to bear in mind are.... any surgery can be stressful as it involves being in hospital, off your regular routine / work, pain etc. And stress can result in deterioration in mental health condition. Just make sure you have good support network and you are in touch with your psychiatrist before and after surgery to monitor your mental state and to review medicines as necessary. Secondly, as long as you have no other medical conditions, medicine is stopped only on the day of surgery. Once you start on oral feeds medicine can be resumed. Please inform the anaesthetist about your medicines and have your psychiatrist's contact number handy for your orthopedist to contact if necessary. Best wishes