Street drugs and alcohol

Amphetamines
Amphetamines include both the specific chemical "amphetamine" and the general class of chemicals which share structural similaries.

Caffeine
Caffeine is a chemical with stimulant properties that is found in many plants including tea, coffee, and guarana.

Mescaline
Mescaline is a psychoactive phenethylamine chemical, best known for being the primary psychoactive component in peyote and San Pedro cacti.

Phencyclidine (PCP)
Phencyclidine (PCP) is a chemical in the dissociative anaesthetic class.

5-MeO-DMT
5-MeO-DMT is a psychoactive tryptamine which was first identified in the mid 20th Century as a chemical in a South American plant entheogen.

BZP
Benzylpiperazine (BZP) is a piperazine and a CNS stimulant.

MDMA/ecstasy
MDMA or ecstasy is a "psychedelic amphetamine" that has gained popularity because of its ability to produce strong feelings of comfort, empathy, and connection to others.

Nitrous oxide (laughing gas)
Nitrous Oxide (N2O) is a simple gas that, when inhaled, causes rapid analgesia (pain relief), euphoria, mild sedation, and sometimes psychedelic dissociation.

2 C-B
2C-B is a synthetic psychedelic that first gained popularity as a legal Ecstasy replacement in the mid 1980s.

Cocaine users control cravings
Cocaine addicts can control their cravings by willpower alone, US researchers reported in a study that suggests the right training may help abusers kick the habit.