Effects of this medicine
This medicine suppresses growth of cancer cells by selectively entering cancer cells with HER2, which is required for growth of cancer cells, and inhibiting DNAs synthesis.
It is usually used to treat HER2-positive unresectable or recurrent breast cancer after prior chemotherapy (limit the use to patients who are refractory or intolerant to standard treatments) and HER2-positive unresectable advanced or recurrent gastric cancer that has progressed after cancer chemotherapy.
Possible adverse reactions to this medicine
The most commonly reported adverse reactions include nausea, fatigue, loss of appetite, alopecia, vomiting, anemia, diarrhea, constipation, stomatitis, and malaise. If any of these symptoms occur, consult with your doctor or pharmacist.
The symptoms described below are seen as initial symptoms of the adverse reactions indicated in brackets. If any of these symptoms occur, stop taking this medicine and see your doctor immediately.
- breathing difficulty, dry cough, fever [interstitial lung disease]
- anemia, fever, bleeding tendency (nasal bleeding, gum bleeding, subcutaneous bleeding) [myelosuppression]
- breathing difficulty, consciousness disturbance, swelling in the eyelids/lips/tongue, fever, chills, vomiting, cough, dizziness, palpitation [infusion reaction]
The above symptoms do not describe all the adverse reactions to this medicine. Consult with your doctor or pharmacist if you notice any symptoms of concern other than those listed above.