Analog (Drug)
PharmacologyA compound chemically related to a parent drug, close enough in structure to produce related (or deliberately different) effects. In psychedelic medicine, "analog" usually means one of two things: a modified version of a psychedelic designed to keep the therapeutic effect while removing the trip, the heart risk or the patent problem; or, in U.S. law, an unscheduled chemical treated as a Schedule I drug because it's "substantially similar" to one.
Medical example: Tabernanthalog is an ibogaine analog engineered at UC Davis to keep the neuroplasticity effect while dropping the hallucinogenic and cardiac risk. Delix Therapeutics' zalsupindole, another non-hallucinogenic analog, showed no hallucinatory or dissociative effects in early trials, and the company raised $100 million in November 2026 to start a Phase 2b depression trial in 2027. Companies also use analogs as a patent strategy; see how CaaMTech applies the idea to psilocybin.
Legal example: Under the Federal Analogue Act (21 U.S.C. § 813), a chemical that is substantially similar in structure and effect to a Schedule I or II drug is treated as Schedule I if it's intended for human consumption. Labeling it "not for human consumption" doesn't, by itself, protect the seller. FDA-approved drugs and compounds in authorized research are exempt.
What is a drug analog?
A compound chemically related to a parent drug, close enough in structure to produce related, or deliberately different, effects.
What is "analog medicine" in psychedelics?
Drug development built on modified versions of psychedelics, usually designed to keep the brain-rewiring (neuroplasticity) effect without the hallucinations, so the drug could be taken at home without a supervised session. Examples include Tabernanthalog and Delix Therapeutics' zalsupindole. None has been approved yet, and whether a drug works as well without the psychedelic experience is still an open question.
Are psychedelic analogs legal?
Not automatically. Under the U.S. Federal Analogue Act, an unscheduled chemical that is substantially similar to a Schedule I or II drug is treated as Schedule I if it's meant for human consumption. Analogs in FDA-authorized clinical trials are exempt.