Allegra 180mg tablets are a type of medication primarily used to relieve symptoms associated with allergic rhinitis (hay fever) and chronic idiopathic urticaria (hives of unknown cause). Here's a brief description:

• Active Ingredient: The active ingredient in Allegra 180mg tablets is Fexofenadine hydrochloride, which is an antihistamine.

• Indications: Allegra 180mg tablets are indicated for the relief of symptoms associated with seasonal allergic rhinitis (hay fever) such as sneezing, runny nose, itchy or watery eyes, and itching of the throat or nose. It is also used for the treatment of symptoms of chronic idiopathic urticaria (hives) including itching and rash.

• Mode of Action: Fexofenadine works by blocking histamine receptors in the body. Histamine is a substance produced by the immune system during an allergic reaction. By blocking histamine receptors, fexofenadine reduces allergic symptoms.

• Dosage: The typical dosage for adults and children aged 12 years and older is one 180mg tablet once daily. Dosage may vary based on individual response and medical condition.

• Administration: Allegra tablets are usually taken orally, with or without food.

• Precautions: It's important to follow the dosage instructions provided by your healthcare provider. Avoid taking Allegra with fruit juices (especially grapefruit, apple, or orange juice) as they may affect the absorption of the medication. Caution should be taken in patients with renal impairment, and dosage adjustments may be necessary.

• Side Effects: Common side effects may include headache, dizziness, nausea, and drowsiness. Serious side effects are rare but may include allergic reactions or severe dizziness. It's important to seek medical attention if you experience any severe symptoms.

• Storage: Store Allegra tablets at room temperature away from moisture and heat.

Always consult with your healthcare provider or pharmacist for specific instructions regarding the use of Allegra 180mg tablets, especially if you have any underlying medical conditions or are taking other medications.