Robitussin (dextromethorphan) is now a prescription in several countries for its abuse potential, like codeine. It is a dissociative hallucinogen that can be abused, but it is generally considered a poor substitute to other substances like ketamine, rarely a first choice.

Nutmeg is a deliriant on really high doses, and most deliriants are not controlled substances, though they may be classified as poisons. The reason is that tripping on deliriants is generally considered unpleasant, and enough to turn people off quickly.