What is Allegra?

• Allegra is an antihistamine. Antihistamines work against the naturally occurring chemical histamine in your body.
• Allegra is used to prevent sneezing, runny nose, itching and watering of the eyes, and other allergic symptoms.
• Allegra may also be used for purposes other than those listed in this medication guide.

What is the most important information I should know about Allegra1?

• Never take more of this medication than is directed by your doctor. If your symptoms are not being adequately treated, talk to your doctor.

How should I take Allegra?

• Take Allegra exactly as directed. If you do not understand these instructions, ask your pharmacist, nurse, or doctor to explain them to you.
• Take each dose with a full glass of water.
• Allegra is usually taken twice a day, in the morning and the evening. Follow your doctor's instructions.
• Do not take Allegra close to a dose of an antacid that contains aluminum or magnesium such as Rolaids, Maalox, Mylanta, Milk of Magnesia, Pepcid Complete, and others. These antacids may decrease the effects of Allegra.
• Never take more of this medication than is directed by your doctor. If your symptoms are not being adequately treated, talk to your doctor.
• Store Allegra at room temperature away from moisture and heat.

What are the possible side effects of Allegra?

• Stop taking Allegra and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives).
• Allergic reactions occur only rarely, and other serious side effects are not likely to occur.
• Some less serious side effects may be more likely to occur. Continue to take Allegra and talk to your doctor if you experience nausea or an upset stomach.
• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect Allegra?

• Do not take Allegra close to a dose of an antacid that contains aluminum or magnesium such as Rolaids, Maalox, Mylanta, Milk of Magnesia, Pepcid Complete, and others. These antacids may decrease the effects of Allegra.
• Drugs other than those listed here may also interact with Allegra. Talk to your doctor and pharmacist before taking other medications, including herbal products.