 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  1-800-222-1222. Canada residents can call a provincial poison control center.  Notes Keep all regular medical and lab appointments.  Missed Dose If you are using this product on a regular schedule and miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Use your next dose at the regular time. Do not double the dose to catch up.  Storage Refer to storage information printed on the package. If you have any questions about storage, ask your pharmacist. Keep all medications and herbal products away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.The uses of Trastuzumab-Dkst Intravenous: Trastuzumab is used to treat certain types of breast, stomach, or esophagus cancer. This medication is used to treat tumors that produce more than the normal amount of a certain substance called HER2 protein. Trastuzumab belongs to a class of medications known as monoclonal antibodies. It works by slowing </s>