Relenza

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Question

What are the side effects of Relenza?

Answer

Relenza® (zanamivir) is a medication for treating the flu and typically has few side effects. Uncommon side effects include bronchitis, cough, stuffy nose, nausea, vomiting, diarrhea, dizziness, and headache. Infrequently, Relenza® may cause difficulty breathing.

Potential side effects for users with pre-existing conditions

Difficulty breathing is more likely in people with asthma, emphysema, or chronic bronchitis, but also has been reported by people who don't have these conditions. In most cases, people with lung disease should not use Relenza® in order to avoid developing serious breathing problems.

Visit our Flu Center for more information and resources on the flu.

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