Plants:
- tobacco
- cannabis
- salvia divinorum
- opium
- datura and other Solanaceae (formerly smoked to treat asthma)
- possibly other plants (see the section below)
Substances (also not necessarily psychoactive plants soaked with them):
- methamphetamine
- crack cocaine
- black tar heroin
- phencyclidine (PCP)
- synthetic cannabinoids (see also: synthetic cannabis)
- dimethyltryptamine (DMT)
- 5-MeO-DMT
- fentanyl
- many others, including some prescription drugs