Side effects from cold and flu medications
With colds and flu, most of the medications used are available directly from your pharmacist or chemist. The most common side effect of cold and flu medications is drowsiness, so it is best not to drive or operate machinery. Some of the medications are specifically designed to be taken at night, to prevent drowsiness during the day. It is important to tell your pharmacist or doctor if you have any other adverse reaction to any medication.