Be it cough, allergy symptoms such as runny nose, stuffy nose, sneezing, watery eyes, and congestion or stiffness, Benadryl comes to your rescue. Benadryl Syrup 150 ml is an antihistamine (anti-allergic) drug that is used to relieve allergic symptoms (such as sneezing, watery eyes, runny nose, itchy nose/throat), common cold symptoms, and cough. An allergy is the immune system's reaction to something that isn't harmful to your body. These foreign substances are referred to as allergens. Benadryl is also used to help people fall asleep, treat Parkinson's disease, and stop coughing due to mild throat or airway discomfort. Just use it if your doctor has prescribed it. Never promote self-medication or recommend that someone else take the medication. If you are sensitive to diphenhydramine, have serious liver or kidney disorders, or have epilepsy or glaucoma, you should not take Benadryl Syrup 150 ml. Increase your fluid intake to loosen your mucus.