Is it true that you should do dmt before u do lsd, and a day or something later do lsd but is that true?

You should do none: Of it period! there is no reason to do any of those drugs, particularly if you are really 40 years old! hallucinogens are dangerous drugs for many people - they speed up the heart and can raise blood pressure, which may not be an issue at 20 but it can be at 40. You don't know what you are really getting, and deaths have occurred from adulteration. Get help and treatment for chemical dependency.