Many times it begins reactive to some real problem, but with time it becomes physical. That also happens with several real organic diseases, which can even be seen in clinical or radiological examinations. For instance Stomach Ulcer, Heart Infarct, Gastritis, etc. If you suffer from Glaucoma or some renal or cardiac illness, inform your Doctor. He will find the suitable antidepressant for you as well as investigate any illness, which might be related with your Depression.
Antidepressants are medicines, which correct the neurotransmitter metabolism.
They are neither tranquilizers nor stimulants. They do not produce physical or psychological addiction. Psychotherapy can be very helpful, as the Depression affects the person as a whole and almost no illness of mankind is restricted only to its physical aspect. Traces of personality as well as present or past problems may have something to do with the Depression. But there are several techniques of Psychotherapy, and some can even be harmful for the treatment of Depression.