Effects of cannabis, even more than of other hallucinogens, are highly variable from person to person and from one plant strain to another. This variability comes mainly from the unstable character of some of the constituents. Over a period of time, for example, the inactive cannabidiolic acid converts to active tetrahydrocannabinols and eventually to inactive cannabinol, such chemical changes usually taking place more rapidly in tropical than in cooler climates. Material from plants of different ages may thus vary in narcotic effect.
The principal narcotic effect is euphoria. The plant is sometimes not classified as hallucinogenic, and it is true that its characteristics are not typically psychotomimetic. Everything from a mild sense of ease and well-being to fantastic dream
