Benadryl Allergy Liquid Release 10mg Capsules Benadryl Allergy Liquid Release 10mg Capsules contain the antihistamine cetirizine dihydrochloride to fight the symptoms of hayfever & other allergic conditions such as pet, skin & dust allergies. These symptoms include itchy, runny nose, sneezing, itchy, watery eyes & urticaria (hives & itchy skin rash). Benadryl Allergy Liquid Release 10mg Capsules offer one-a-day relief from the form of an easy to swallow soft liquid capsule, to relieve those pesky symptoms quickly & effectively.