CA3032912A1 — High-concentration fulvestrant compositions

USPTO Abstract

The present disclosure is directed to a pharmaceutical composition suitable for intramuscular (IM) administration, comprising fulvestrant, a pharmaceutically acceptable alcohol(s), a cosolvent(s), a lipophilic vehicle comprising a release-controlling oil, and, optionally, at least one surfactant and/or an antioxidant. The composition comprises fulvestrant at a concentration of at least 50 mg/ml, e.g., 100 mg/ml, wherein the composition exhibits excellent storage stability at long-term and accelerated storage conditions. The composition of the disclosure can deliver a 250-500 mg dose of fulvestrant as a single IM injection from a prefilled syringe, e.g., 500 mg / 5 ml or 250 mg / 2.5 ml in a prefilled syringe.