Tetrahydrocannabinol | Drug - Encyclopedia Britannica

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tetrahydrocannabinol drug Ask Anything Also known as: THC Written and fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Jan. 7, 2026 History Britannica AI Icon Britannica AI Ask Anything Table of Contents Table of Contents Ask Anything
The chemistry of marijuana
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tetrahydrocannabinol (THC), active constituent of marijuana and hashish that was first isolated from the Indian hemp plant (Cannabis sativa) and synthesized in 1965. For the effects of the drug, see marijuana.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Adam Augustyn.

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