Hello doc. My son had cold and fever 4 days back. We gave 3.5 ml. of calpol once for one day and then 3 ml of relent once in a day for 2 days. His fever and cold was gone. But now he has cough congested in his throat and is not coming out. He is feeling very uncomfortable. He vomited once today and some cough came out. But cough is still there. He can't sleep comfortabley. Can you please suggest some drops/ syrup. So that the cough can come out through his motions. Thanks much.