Other Information: Each Caplet Contains: magnesium 15 mg. Store at room temperature. Avoid excessive heat above 104 degrees F (40 degrees C). Misc: Ephedrine sulfate/bronchodilator. Guaifenesin/expectorant. Strongest formula available in a 1 caplet dose. Dual Action Formula: Restores freer breathing; loosens phlegm. Relief of mild intermittent asthma symptoms. Pharmacist recommended. Questions or comments? 1-800-986-0369 (Mon-Fri 9AM-5PM EST) or www.bayercare.com.