My father is going through depression for about 10 days. We have taken him to a psychiatric doctor. He is under medication and taking - XET CR PLUS 12.5mg, QUETALENT 50mg, ENTINAP 0.5mg one pill at night. He has taken these medicines for 6 days out of 10. My father is also suffering from diabetes. He was in a habit of smoking and drinking but now he has stopped drinking but still smokes about 8-10 cigarettes a day. He is depressed about his children's marriage and other problems. Please tell me that how long will the depression get over. My father often gets more irritated in afternoon.