Lapatinib is used in combination therapy for the treatment of HER2+ breast cancer. It is used in the treatment of patients with advanced or metastatic breast cancer whose tumors overexpress HER2. It is used for the treatment of breast cancer and other solid tumours. Always consult the doctor before starting the treatment as it may cause some side effects and allergies. There are different prices according to wholesalers and brands. varies around from Rs. 5995 to Rs. 13,350 for a supply of 30 tablets.