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Showing posts with the label Second Generation Antihistamines

Fexofenadine, Structure, Mechanism of action, Drug Interactions, Therapeutic Uses, Adverse effects and Contraindications

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                                            Fexofenadine Fexofenadine is an antihistamine medication that is commonly used to relieve symptoms of allergies. It belongs to a class of drugs known as second-generation antihistamines and is available both over-the-counter and by prescription. Fexofenadine is available under various brand names, both as prescription and over-the-counter products. Some common brand names of fexofenadine include: 1. Allegra: Allegra is a well-known brand of fexofenadine. It is available in different strengths, including Allegra 24 Hour (180 mg) and Allegra-D 12 Hour (a combination of fexofenadine and pseudoephedrine). 2. Allegra-D: Allegra-D is a combination medication that contains fexofenadine and pseudoephedrine. Pseudoephedrine is a decongestant that helps relieve nasal congestion associated with allergies. 3. Telfast: Telfast is another brand ...

Cetirizine, Structure, Mechanism of action, Drug Interactions, Therapeutic Uses, Adverse effects and Contraindications

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  Cetirizine Cetirizine is an antihistamine medication commonly used to relieve symptoms associated with allergies, such as hay fever, allergic rhinitis, and hives. It belongs to the second-generation antihistamines, which are known to cause less drowsiness compared to the older generation antihistamines. Cetirizine is available under various brand names, some of which include: 1. Zyrtec: Zyrtec is one of the most well-known brand names for cetirizine. It is available in different formulations, including tablets, chewable tablets, and syrup. 2. Reactine: Reactine is another popular brand name for cetirizine. It is available in tablet and liquid gel formula tions. 3. Aller-Tec: Aller-Tec is a brand name for cetirizine that is often available in generic forms. It is commonly found in stores and pharmacies. 4. Cetzine: Cetzine is a brand name used for cetirizine in some regions. 5. Cetrine: Cetrine is another brand name for cetirizine that is available in certain countries. It...

Loratadine, Structure, Mechanism of action, Drug Interactions, Therapeutic Uses, Adverse effects and Contraindications

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  Loratadine   Loratadine is a commonly used antihistamine medication that is primarily used to treat allergies. Loratadine is available under various brand names worldwide. Some of the common brand names for loratadine include: 1. Claritin 2. Alavert 3. Allergy Relief (generic) 4. Lorfast 5. Telfast 6. Clarityn 7. Lorinase 8. Lora-Tabs 9. Sensibit 10. Loridin Please note that brand names may vary depending on the country or region. Mechanism Of Action The MOA (mechanism of action) of loratadine involves its ability to block the effects of histamine, which is a chemical produced by the body during an allergic reaction. Here's a breakdown of its MOA: 1. Histamine release: When the body encounters an allergen, such as pollen or pet dander, mast cells in the body release histamine as part of the immune response. 2. Histamine receptors: Histamine binds to specific receptors, known as H1 receptors, located on various cells throughout the body, including those in the respiratory...

Desloratadine, Structure, Mechanism of action, Drug Interactions, Therapeutic Uses, Adverse effects and Contraindications

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                                                                    Desloratadine Desloratadine is an antihistamine medication used to relieve allergy symptoms. It belongs to a class of drugs known as second-generation antihistamines, which are generally preferred over older antihistamines due to their reduced sedative effects. Common uses for desloratadine include treating seasonal allergies (hay fever) and symptoms associated with allergic rhinitis, such as sneezing, nasal congestion, itching, and watery eyes. It may also be prescribed to manage chronic idiopathic urticaria, which is a skin condition characterized by hives and itching. Desloratadine is typically taken orally in the form of tablets or oral solution. The recommended dosage and duration of treatment depend on the individual and the specific condition be...

Levocetirizine, Structure, Mechanism of action, Drug Interactions, Therapeutic Uses, Adverse effects and Contraindications

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  Levocetirizine Levocetirizine is an antihistamine medication used to treat various allergic conditions. Levocetirizine is primarily used to relieve symptoms associated with allergies, such as hay fever (allergic rhinitis), hives (urticaria), and other allergic skin conditions. It helps reduce the effects of histamine, a natural substance produced by the body during an allergic reaction. Levocetirizine is available under various brand names worldwide. Some common brand names for levocetirizine include : 1. Xyzal 2. Levrix 3. Supracyclin 4. Xusal 5. Zyxem 6. Histazine 7. Odicet 8. Sibalukast 9. Histylex 10. Alzene Please note that the availability of specific brand names may vary depending on your country or region. Mechanism Of Action The MOA (mechanism of action) of levocetirizine involves its interaction with histamine receptors in the body. Levocetirizine is an antihistamine that selectively blocks the H1 histamine receptors. Here's a breakdown of its mechanism of action: 1. H...