If you take Xanax 24 hours after a ketamine infusion, is there still an interaction?

Hi, gculver!
"From a clinical standpoint it is estimated that a drug is effectively eliminated after 4-5 half-lives, meaning the majority of ketamine should be out of the system of an adult in about 10 to 12.5 hours. Factors such as age, body mass, metabolic rate, drug dosage, and route of administration can affect the duration and elimination of the drug."
I would check with your doctor first but if you give it a try just be aware that the combination could cause dizziness, drowsiness, confusion, difficulty concentrating, excessive sedation, and respiratory depression.
That all being said, it's probably safe if you're careful or maybe be sure someone is around to keep an eye on you.