Value Size! Diphenhydramine Hydrochloride / Antihistamine. For Allergy Relief. Sneezing • Itchy Nose • Itchy Watery Eyes • Itchy Throat. Easy to Swallow. UltraTabs™ Tablets *Small Tablet Size. Get effective relief from your allergies with Benadryl Allergy Ultratab Tablets – antihistamine relief in a small tablet that works when you need it most. . Uses: temporarily relieves these symptoms due to hay fever or other upper respiratory allergies:. runny nose. sneezing. itchy watery eyes. itching of the nose or throat. temporarily relieves these symptoms due to the common cold: runny nose sneezing.