It is always best to strictly follow the recommendations and guidelines of your surgeon and anesthesiologist. Typically, vitamin C and calcium supplements (that have no other ingredients) are considered safe by most surgeons, but much relies on your health history and your surgeons preferences.I hope this helps.
I ask my patients to discontinue most vitamin supplements 2 weeks prior to surgery. Vitamin C and Calcium most likely won't interfere with your surgery and recovery - however, if they are in combination with other supplements they may be contraindicated. I recommend contacting your surgeon to inquire about his/her particular preoperative guidelines. Good luck with your upcoming surgery!Mark Petroff, MD