Lapatinib is a medication used in the treatment of breast cancer that has spread to other parts of the body. It belongs to a class of drugs known as tyrosine kinase inhibitors, which work by blocking certain proteins that are involved in the growth and spread of cancer cells.
The usual recommended dose of Lapatinib is 1,250 mg (five 250 mg tablets) once a day, taken on an empty stomach at least one hour before or after a meal. It is typically taken in combination with another medication called capecitabine.
It is important to take Lapatinib exactly as prescribed by your doctor. Do not change your dose or stop taking the medication without first consulting with your doctor.
Like all medications, Lapatinib may cause side effects. Common side effects may include diarrhea, nausea, vomiting, skin rash, and fatigue. If you experience any concerning symptoms or side effects, be sure to speak with your doctor as soon as possible.