Low level of noradrenaline is the cause of depression

Low level of noradrenaline is the cause of depression. What types of drugs are needed to cure this problem? Name two drugs.

In the event of low level of neurotransmitter, noradrenaline antidepressant drugs are required. These drugs inhibit the enzymes which catalyse the degradation of noradrenaline. If the enzyme is inhibited, noradrenaline is slowly metabolised and thus, activates its receptor for longer periods of time, thereby reducing depression. Iproniazid and phenelzine are such two drugs.