Anti-anxiety drugs: for phobias and generalised anxiety eg. Valium

Anti-depressant drugs: for depression eg. Prozac

Anti-psychotic drugs: for schizophrenia eg. Phenothiazine

Doesn't work for all patients

Side effects - Phenothiazine leads to Parkinson's disease

Focuses only on the symptoms not the cause

Ethical issues

Biological: Drugs

Weaknesses