Ketamine for Post-operative Analgesia in Hemorrhoidectomy

This study is testing whether the drug ketamine can help reduce pain after hemorrhoid removal surgery (hemorrhoidectomy), so patients need less opioid pain medication after their procedure. **You may be eligible if:** - You are an adult between 18 and 100 years old - You are scheduled to have a hemorrhoidectomy for grade III or IV hemorrhoids (moderate to severe) **You may NOT be eligible if:** - You are unable to safely receive general anesthesia - You have a history of schizophrenia, psychosis, or other conditions that cause hallucinations - You use chronic narcotic (opioid) medications — defined as having a pain management contract and regular opioid use Talk to your doctor to see if this trial is right for you.