Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Dizziness can cause falls, accidents, or severe injuries.
Grapefruit may interact with dextromethorphan and quinidine and lead to unwanted side effects. Avoid the use of grapefruit products.
Ask a doctor or pharmacist before using any cough or cold medication that may contain dextromethorphan. Taking certain products together can cause you to get too much dextromethorphan. Check the label of medicines such as Delsym, Robitussin Maximum Strength, Vicks 44, and others.
