Antihistamines
Antihistamines are medications that are used to treat allergies and allergic reactions. They work by blocking the action of histamine, a chemical that is released by the body in response to an allergic trigger.
There are several types of antihistamines, including:
- H1-antihistamines: H1-antihistamines block the action of histamine at H1 receptors, which are found in the nose, lungs, skin, and gastrointestinal tract. They are commonly used to treat allergies and allergic reactions, such as hay fever, hives, and allergic asthma.
- H2-antihistamines: H2-antihistamines block the action of histamine at H2 receptors, which are found in the stomach and intestine. They are commonly used to treat stomach acid conditions, such as peptic ulcer disease and gastroesophageal reflux disease (GERD).
Antihistamines are available in several forms, including tablets, capsules, liquids, and creams. They are often used to treat symptoms such as sneezing, runny nose, and itchy eyes, but they can also have potential risks and side effects, including drowsiness, dry mouth, and dizziness. It is important to follow the instructions of a healthcare provider or pharmacist when using antihistamines.
Antihistamines
Antihistamines are medications that are used to treat allergy symptoms such as nasal congestion, sneezing, itching, and runny nose. They work by blocking the action of histamine, a chemical that is released by the body during an allergic reaction. Antihistamines are available over-the-counter and by prescription, and they can be taken orally or applied topically. Some common over-the-counter antihistamines include diphenhydramine (Benadryl), loratadine (Claritin), and cetirizine (Zyrtec).
It is important to follow the instructions on the label or as directed by a healthcare provider when taking antihistamines. Overuse or misuse of these medications can cause side effects such as drowsiness, dry mouth, and dizziness. Antihistamines may also interact with certain medications and should not be taken with certain medical conditions. It is always best to consult a healthcare provider before starting any new medication.