Benadryl Allergy Dye-Free Liqui-Gels temporarily relieve the symptoms associated with both upper respiratory allergies and the common cold. Each of these liquid gels contains an antihistamine, diphenhydramine HCl 25 milligrams, to temporarily treat allergy symptoms of sneezing; runny nose; itchy nose or throat; and itchy, watery eyes; and the cold symptoms of sneezing and runny nose. This allergy medicine has a dye-free formula and the Benadryl liquid capsules are intended for adults and children ages six and up.