It’s generally recommended that patients stop drinking alcohol at least 24 hours before knee surgery. This is because alcohol can interact with anesthesia and pain medications, leading to potential complications during or after the surgery. Additionally, drinking alcohol before surgery can increase the risk of bleeding, slow down the healing process, and lead to longer hospital stays. It’s important to follow your surgeon’s specific instructions regarding alcohol consumption before surgery, as the exact time frame may vary depending on your individual health status and the type of surgery you are having.