Noll Q Tablet is used to treat common cold symptoms. It thins mucus in the nose, windpipe, and lungs making it easier to cough out. It provides relief from seasonal allergic conditions such as runny nose, watery eyes, sneezing, and congestion or stuffiness. It is taken with or without food in a dose and duration as advised by the doctor. The most common side effects are nausea, vomiting, diarrhea, bloating, indigestion, headache, rash, and loss of appetite. Most of these are temporary and usually resolve with time. It can also cause dizziness and sleepiness, so do not drive or do anything that requires mental focus until you know how this medicine affects you. Avoid drinking alcohol while taking this medicine as it can make dizziness worse.