Alka-Seltzer Plus Maximum Strength Cough, Mucus & Congestion Day PowerMax Gels: In Each Capsule: Other Information: Store at 15 degrees - 25 degrees C (59 degrees - 77 degrees F) Alka-Seltzer Plus Maximum Strength Cough, Mucus & Congestion Night PowerMax Gels: In Each Capsule: Other Information: Store at 15 degrees - 25 degrees C (59 degrees - 77 degrees F).