Is fulvestrant/fulvestrant an oral drug or an injectable drug?

Fulvestrant (Fulvestrant) is an injectable drug specifically used to treat HER2 negative, hormone receptor positive breast cancer. Unlike most endocrine drugs, fulvestrant is not taken orally but given to patients by injection. It usually comes in the form of an injection, and patients need to go to a hospital or clinic regularly for injection treatment.

The injectable form of fulvestrant is given by injection deep into the muscle, usually into the buttock or thigh muscles. After each injection, the drug is slowly released through the muscles into the bloodstream, providing sustained benefits. Compared with oral drugs, the injectable form of fulvestrant can ensure a stable concentration of the drug in the body and can continue to act on tumor cells, avoiding the possible reduction in bioavailability of oral drugs due to liver metabolism.

Fulvestrant is usually given as a monthly injection to ensure the long-term effectiveness of the drug in the treatment of breast cancer. It can be used in combination with other anti-cancer drugs, especially in the metastasis or recurrence stage of breast cancer, to provide patients with a more lasting therapeutic effect. Compared with oral medications, injectable treatment with fulvestrant avoids treatment instability that may occur due to missed doses or irregular medication use.

One of the advantages of fulvestrant as an injectable drug is that it does not need to be metabolized by the liver and can take effect directly in the patient's body. This makes the drug safer for liver function during treatment, especially for those patients with liver dysfunction, in which the injectable form of the drug may be a more suitable choice.

Although injection therapy may be inconvenient for some patients, the benefits of fulvestrant injection therapy are significant. It not only controls tumor growth through stable drug release, but also reduces patients' drug dependence and the risk of forgetting to take medications during treatment.

References: https://medlineplus.gov/druginfo/meds/a607031.html