In Each Piece: Other Information: Each piece contains: potassium 10 mg. Store at 15-25 degrees C (59-77 degrees F). Sennosides, 15 mg chocolated stimulant laxative. Gentle overnight relief you can trust. Relief guaranteed. The Ex Lax Guarantee: When taken as directed, Ex Lax is guaranteed to work gently and effectively overnight or your money back. Return product to GSK, attention Consumer Affairs, for full refund. Questions or comments? Call 1-855-221-5432.