Mucusnil Tablet ER is an expectorant. It is used for the treatment of cough and congestion. It helps in bringing mucus out of the lungs thus helps in treating cough. Mucusnil Tablet ER can be taken with or without food, but take it at the same time to get the most benefit. It should be taken as per your doctor's advice. The dose and how often you take it depends on what you are taking it for. Your doctor will decide how much you need to improve your symptoms. You should take this medicine for as long as it is prescribed for you. In case, you have missed any doses than it is better to take the next dose as soon as you remember it. However, you should never take a double dose. The most common side effects of this medicine include nausea, vomiting, stomach pain, diarrhea, and dizziness. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. To overcome dizziness, avoid driving and attention-seeking activity while on treatment. Before taking this medicine, let your doctor know if you have liver or kidney disease or if you are pregnant or breastfeeding. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Generally, it is advised to avoid alcohol while on treatment.