Trastuzumab is a prescription medication used for the treatment of certain types of breast cancer. It is available under the brand name Kadcyla [2]. Kadcyla is a medication that contains trastuzumab and is administered intravenously [2].

The Drug Patent Watch website provides information on the patents for trastuzumab, which can help determine when generic versions of the drug may become available [1]. However, it does not provide information on where to find the drug.

To obtain trastuzumab, a prescription is required from a healthcare provider. The medication is typically administered in a hospital or clinic setting by a healthcare professional [2]. It is not available over the counter and cannot be purchased online without a prescription.

The FDA label for trastuzumab provides detailed information on the use, dosage, and administration of the medication [3]. It is important to follow the instructions of a healthcare provider and the medication label when taking trastuzumab.

In summary, trastuzumab is available under the brand name Kadcyla and is administered intravenously in a hospital or clinic setting with a prescription from a healthcare provider. The Drug Patent Watch website provides information on the patents for trastuzumab, which can help determine when generic versions of the drug may become available [1]. It is important to follow the instructions of a healthcare provider and the medication label when taking trastuzumab [3].

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/ingredient/trastuzumab
[2] https://www.kadcyla.com/
[3] https://www.accessdata.fda.gov/drugsatfda_docs/label/2010/103792s5250lbl.pdf