Benadryl Dye-Free Liqui-Gels Antihistamine Allergy Medicine temporarily relieve the symptoms associated with hay fever or other upper respiratory allergies as well as the common cold. Each of these liquid gels contains 25 mg of the antihistamine diphenhydramine HCl 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 to relieve indoor and outdoor allergy symptoms.