Mescaline is the active ingredient in peyote, a small cactus, and it can also be made synthetically.
Less research has examined mescaline than other psychedelics such as LSD and psilocybin, although it appears to produce similar feelings and side effects. Limited research means your experience deserves individual attention rather than broad assumptions. The frequency and context of use, distressing effects, difficulty changing, and effects on your responsibilities can all help clarify whether care may be useful.
