Types of medications used for allergies

The medications which are available for treating allergic reactions are divided into four categories: decongestants, nasal antihistamines, nasal sprays and oral antihistamines. The main function of allergic medication is to block the allergens or symptoms which are causing the release of the chemicals like histamine. There are several forms in which allergic medications available such as pills, sprays, skin creams and eye drops. Medications such as corticosteroids are used for treating all kind of allergic reactions. They work by preventing and treating the inflammation by stopping the allergic reactions. During any allergic reaction, the body starts secretion of inflammatory chemical known as histamine and to stop its secretion antihistamines medication are made use of. They are used for relieving the symptoms of sneezing, itching, watery nose and eyes, congestion of sinus. For relieving the symptoms of congestion of sinus and nose, medicines known as decongestants are used but one thing must be remembered that pregnant women must avoid the use of decongestants because it increases the blood pressure. With the benefits associated with allergic medications there are several drawbacks such as it causes drowsiness, increases blood pressure or may cause bleeding from the nose. So it is better to take these medicines under the prescription of doctor.