Other Information: Each tablet contains: calcium 20 mg. Store at 68-77 degrees F (20-25 degrees C). Avoid high humidity. Protect from light. Do not use if blister unit is broken or torn. Misc: Diphenhydramine HCl 25 mg - antihistamine. Small tablet size. Easy to swallow. Sneezing. Sneezing. Itchy, watery eyes. Runny nose. Itchy throat. Compare to active ingredient of Benadryl Allergy Ultratab. Convenient reclosing tab. Gluten free.