Prescription requiredAntiallergic (Antihistamine)

Allegra 180 Tablet — Side Effects & Warnings

Known side effects of Allegra 180 Tablet include Headache, nausea.. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated July 2026

Common Side Effects

Headache
nausea.

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Avoid grapefruit juice; check interactions.

Pregnancy Safety

Allegra 180 mg Tablet may be unsafe to use during pregnancy.<br>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. The benefits from use in pregnant women may be acceptable despite the risk. Please consult your doctor.

Alcohol Interaction

Allegra 180 mg Tablet may cause excessive drowsiness and calmness with alcohol.

Storage

Store below 25Ã‚Â°C.

Allegra 180 Tablet — Safety Summary

Composition: Fexofenadine (180mg)
Prescription: Required (Rx)
Pregnancy: Allegra 180 mg Tablet may be unsafe to use during pregnancy.<br>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. The benefits from use in pregnant women may be acceptable despite the risk. Please consult your doctor.
Alcohol: Allegra 180 mg Tablet may cause excessive drowsiness and calmness with alcohol.

Allegra 180 Tablet — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

Get help from a doctor

Consult a doctor

Discuss side effects with a qualified doctor online.

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Full product details for Allegra 180 Tablet.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.