Depressants (downers)
Depressants have a calming and relaxing effect. They make you calm, happy and may reduce anxiety. If you have a lot on your mind, these substances make you forget about it for a while. Depressants decrease many bodily functions; your heart rate, your breathing, your blood pressure, your muscles relax and your senses start working less. Depressants include alcohol, GHB and sleeping pills.