Vitamin C on Acute and Chronic Post Mastectomy Pain

patients in this group will receive 2 gm vitamin C orally 1 hour before surgery and will receive 0.5 gm vitamin C per day orally for 50 days starting from the 2nd postoperative day.

patients in this group will receive placebo tablets with the same manner; orally 1 hour before surgery and for 50 days starting from the 2nd postoperative day.