Tranquilizers area class of chemical compounds used for the treatment of stress and mild mental diseases. These drugs inhibit the enzymes which catalyse the degradation of noradrenaline.
If the enzyme is inhibited, this neurotransmitter noradrenaline is slowly metabolised and can activate its receptor for longer period of time, thus counteracting the effect of depression. Iproniazid and phenelzine are two such drugs. They are called antidepressant drugs.
