Anti Allergics (Anti-Histamines)
There are two main types of antihistamines: first-generation and second-generation. First-generation antihistamines, also known as sedating antihistamines, were developed in the 1940s and 1950s and include drugs such as diphenhydramine (Benadryl) and chlorpheniramine (Chlor-Trimeton). These drugs are effective at blocking histamine, but they also have a sedating effect, which can cause drowsiness and impair performance. As a result, they are often used to treat allergies and other conditions at night, when drowsiness is less of a concern.
Second-generation antihistamines, also known as non-sedating antihistamines, were developed in the 1980s and 1990s and include drugs such as loratadine (Claritin), cetirizine (Zyrtec), and fexofenadine (Allegra). These drugs are less likely to cause drowsiness, making them a good option for people who need to take antihistamines during the day.
Both first-generation and second-generation antihistamines are available over-the-counter (OTC) and by prescription. They can be taken orally (by mouth) in the form of tablets, capsules, or liquid, or they can be applied topically (to the skin) as creams, ointments, or nasal sprays.
Antihistamines are effective at relieving the symptoms of allergies, such as sneezing, itching, and watery eyes. They can also be used to treat other conditions such as colds, flu, and motion sickness. However, they are not effective at treating the underlying cause of allergies, and they can have side effects, such as drowsiness, dry mouth, and dizziness.
It is important to follow the instructions on the label when taking antihistamines, and to talk to a doctor or pharmacist if you have any questions or concerns. If you are taking other medications, it is important to tell your doctor or pharmacist, as some drugs can interact with antihistamines.
In conclusion, antihistamines are a type of medication that are commonly used to treat allergies and other conditions. They work by blocking the action of histamine, a chemical produced by the body that is responsible for many of the symptoms associated with allergies. There are two main types of antihistamines: first-generation (sedating) and second-generation (non-sedating). Both types are available over-the-counter and by prescription, and they can be taken orally or applied topically. While antihistamines are effective at relieving the symptoms of allergies, they are not effective at treating the underlying cause of allergies and can have side effects. It is important to follow the instructions on the label and to talk to a doctor or pharmacist if you have any questions or concerns
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