Depressants are a class of substances that slow down the central nervous system, leading to a calming effect on the body and mind. Common examples include alcohol, benzodiazepines, and barbiturates. These substances can reduce anxiety, promote relaxation, and induce sleep, but they can also impair coordination and judgment. While depressants can be prescribed for medical purposes, such as treating anxiety or insomnia, they carry risks of dependence and overdose. Misuse can lead to serious health issues, including respiratory depression and coma. It is important to use these substances only under medical supervision to minimize potential dangers.