Use caution when driving, operating machinery, or performing other hazardous activities. Pseudoephedrine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities. Swallow them whole. They are specially formulated to release slowly in your body.
Pseudoephedrine is a decongestant.
The constriction of blood vessels in your sinuses, nose, and chest allows drainage of those areas, which decreases congestion. Pseudoephedrine is used to treat congestion associated with allergies, hay fever, sinus irritation, and the common cold. Pseudoephedrine may also be used for purposes other than those listed in this medication guide. A very dangerous drug interaction could occur, leading to serious side effects. You may not be able to take pseudoephedrine, or you may require a lower dose or special monitoring during treatment if you have any of the conditions listed above.