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How long can I stay on Herceptin?

Medically reviewed by Carmen Pope, BPharm. Last updated on April 24, 2025.

Official answer

by Drugs.com

Herceptin, blocks HER2 function (Her2 is a type of protein found in 15-20% of all breast cancers which makes the cancer more aggressive).

Treatment regimens for Herceptin vary depending on hospital protocols, but for the treatment of HER2+ early breast cancer, treatment is usually continued for one year (up to 18 cycles).

Some women are kept on Herceptin long-term if their cancer progresses. How long a women can stay on Herceptin for is not known. The main concerns with long-term therapy are the potential cardiac side effects of Herceptin.

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