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).