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

Internet Dictionary Definitions:

Psychotoxic adjective psy cho tox ic Medical Definition of psychotoxic: having of being a detrimental effect on one's mind, personality, or behavior a psychotoxic chemical https://www.merriam-webster.com/medical/psychotoxic

Psychotoxic [sahy-koh-tok-sik] adjective Pharmacology. toxic or harmful to the mind or personality. https://www.dictionary.com/browse/psychotoxic?s=t

Psychotoxic adjective of or pertaining to certain drugs or chemical compounds, as alcohol, capable of damaging the brain https://www.collinsdictionary.com/us/dictionary/english/psychotoxic

Psychotoxicity Drug-induced psychotoxicity - any state in which the central effects of a drug interfere seriously with normal behaviour https://en.wikipedia.org/wiki/Psychotoxicity

CBD is the non-psychotoxic version of medical marijuana