antialérgicos

Antialérgicos, also known as antihistamines, are a class of drugs that treat allergy symptoms. Allergies occur when the body's immune system overreacts to a normally harmless substance, called an allergen. Common allergens include pollen, dust mites, pet dander, and certain foods. When exposed to an allergen, the body releases histamine, a chemical that causes many of the classic allergy symptoms like sneezing, itching, runny nose, and watery eyes.

Antialérgicos work by blocking the action of histamine. By preventing histamine from binding to its receptors in the body, these medications reduce or eliminate allergic reactions. They are available in various forms, including oral tablets, liquid medications, nasal sprays, and eye drops, allowing for targeted treatment of specific symptoms.

There are different generations of antialérgicos. First-generation antihistamines, such as diphenhydramine, are effective but often cause drowsiness. Second-generation antihistamines, like loratadine and cetirizine, are generally non-drowsy and are preferred for daytime use. It is important to consult a healthcare professional to determine the most appropriate antialérgico for individual needs and to discuss potential side effects or interactions with other medications. Antialérgicos are a cornerstone in managing seasonal allergies, chronic urticaria, and other allergic conditions.