User:Mr. Ibrahem/Lapatinib

Lapatinib, sold under the brand names Tykerb and Tyverb is a medication used to treat breast cancer. Specifically it is used for HER2 positive breast cancer with either letrozole, trastuzumab, or capecitabine. It is taken by mouth.

Common side effects include diarrhea, nausea, rash, tiredness, liver problems, itchiness, and hair loss. Other side effects may include QT prolongation, pneumonitis, low platelets, low red blood cells, or low white blood cells. Use in pregnancy may harm the baby. It is a tyrosine kinase inhibitor which blocks HER2/neu and epidermal growth factor receptor (EGFR).

Lapatinib was approved for medical use in the United States in 2007 and Europe in 2008. In the United Kingdom 4 weeks of 1,000 mg costs the NHS about £970 as of 2021. This amount in the United States costs about 4,300 USD.