Covonia Night Time Formula 150ml contains Dextromethorphan Hydrobromide and Diphenhydramine Hydrochloride. Both of these ingredients are useful to treat the cough, cold and nasal congestion problems associated with Covonia Night time formula. The meidicinal syrup is used to treat the condition of runny nose as well as to reduce the chances of cough. The treatment is not suitable for children below the age of 12years. The syrup can treat cough, cold and sore throat and can also help to reduce sore throat and provide a restful sleep. The medicine causes some drowsyness and hence should only be taken at night before going to bed.