Psychotoxic drugs are the ones that get you intoxicated, high, feelings of euphoria, etc. They affect you mentally in different ways depending on the type of drug you take. They can be doctor prescribed drugs such as barbiturates and amphetamines, as well as illegal drugs like LSD and heroin. Marijuana is in this psychotoxic category too.
CBD however is not psychotoxic. CBD does not give you a buzz.
At the US Federal level; CBD is no longer categorized as a "schedule 1" drug by the DEA (2018 Farm Bill detached CBD without THC from cannabis with THC). CBD derived from Industrial Hemp without the THC is now Schedule 5 (cough syrup is Schedule 5). It can be used by anyone in an attempt to remedy ailments
CBD is the non-psychotoxic version of medical marijuana