what is the best medication for severe ocd?
['Clomipramine (Anafranil) for adults and children 10 years and older.', 'Fluoxetine (Prozac) for adults and children 7 years and older.', 'Fluvoxamine for adults and children 8 years and older.', 'Paroxetine (Paxil, Pexeva) for adults only.']