Reactine Extra Strength Antihistamine Tablets relieves indoor and outdoor allergy symptoms. Allergy symptoms kick in when your immune system overreacts to substances called allergens. Reactine contains 10-milligrams of Antihistamine Cetirizine Hydrochloride to provide fast 24-hour relief of itchy, watery eyes, nasal congestion/stuffiness, itchy nose and throat, sneezing, runny nose caused by seasonal and perennial allergies, and itching due to allergic skin reactions, such as hives. Understanding and recognizing the symptoms is half the battle. Your body releases many chemicals, one of which is called histamine. Histamine is the most abundantly released chemical and is responsible for causing most of your symptoms. Indoor allergens, including mold, dust, and pet dander can cause allergy symptoms at home and at work. Since indoor allergies can be triggered any time of year, they can often be easily confused with a cold. Outdoor pollen from the spring, summer, and fall can be present inside your home too. Speak to your doctor or pharmacist. To be sure this product is right for you, always read and follow the label.Reactine is the #1 most recommended brand by Health Care Professionals. These oral tablets start to work on allergy symptoms quickly, providing long lasting relief up to 24 hours. To be sure this product is right for you, always read and follow the label. Adults and Children 12 years of age and over: 1 tablet every 24 hours, anytime of day. Adults 65 years of age and over: Use Reactine regular strength 5 mg tablets or consult a doctor. Do not exceed recommended dosage. Relief from all your toughest allergy symptoms including itchy, watery eyes, sneezing, runny nose and itchy throat. Effective symptom relief from indoor allergens -including mold, dust, and pet dander - and outdoor allergens like pollen. Reactine contains 10-milligrams of Antihistamine Cetirizine Hydrochloride. Antihistamines work by blocking the sites where histamine binds, to provide fast, 24 hour symptom relief. Reactine Extra Strength Antihistamine Tablets provides allergy relief from your toughest symptoms and lasts 24 hours, all day and all night. Reactine Extra Strength comes in 3/48/84 tablets per pack.