Hi, I used ketamine daily for years and know some things about it. Once the liquid has been evaporated and the powder left, potency will begin to be lost. Always want to acquire in sealed vial. I'm not going to go into details since I'm new and not sure what I can and cannot say about this lol. I was given it once in IV to have my wisdom teeth taken out and it just put me out instantly. Using Ketamine daily can cause some delusional behavior after a few months, but stopping the ketamine usually stops these symptoms quickly. Long term side effects are schizophrenia and liver damage.