Xolair and cancer?

Short answer: There is no proven link that Xolair (omalizumab) raises cancer risk. Some cancer cases have been reported in people treated with omalizumab, but a direct cause-and-effect relationship has not been established. Regulatory reviews have not shown a clear increase in cancer overall, but rare cancers have been seen in trials and after marketing, so the possibility cannot be completely ruled out.

Key points:
- Xolair is used for allergic asthma and chronic idiopathic urticaria, not for cancer.
- The main safety concern with Xolair is the potential for anaphylaxis (rare but real). It’s given in a medical setting with monitoring.
- If you have a history of cancer or currently have cancer, talk with your allergist/immunologist and oncologist about whether Xolair is appropriate for you. The decision is based on weighing asthma/urticaria control against any cancer considerations.
- Do not stop or start Xolair without medical advice.

If you want, I can summarize the exact wording from the current product label or suggest questions to ask your doctor. Are you asking about yourself or someone else, and what condition are you treating with Xolair?