X is an effective expectorant and decongestant formula. It does not cause drowsiness like many over-the-counter decongestants. This formula is used to clear sinus congestion, eliminate phlegmn, helps soothe lung and sinus inflammation, increases circulation to the head, and dilates respiratory passages for normal breathing. This combination is a natural source of magnesium, potassium, silicon and zinc. It is also a source of vitamins A, C and thiamin.