After drinking cough syrup, you can usually drink water after half an hour. Patients who drink cough syrup can usually drink water after half an hour after catching a cold, while drinking water try to drink warm boiled water, not cold water. In the process of paying attention to the water does need, because there is a cough, coughing phlegm, often can appear dry mouth, dumb throat and other symptoms, water supplementation is very important. In addition, then you should try to eat a relatively light, easy-to-digest diet, such as thin rice, noodles, etc. Try not to eat too greasy food. Also pay attention to rest, do not overexert yourself during the process of symptoms, and keep the home environment ventilated.