Multi-arm cyclic or cubic siloxane-based formulations for drug delivery

The present invention provides multi-arm siloxane-based molecules suitable for use as a drug delivery vehicle comprising a central core molecule that comprises a cyclic or cubic siloxane, and a plurality of arms attached to the central core molecule, wherein each arm comprises an organic moiety. The multi-arm siloxane-based molecules described herein are suitable for encapsulation of a therapeutic agent. The invention further includes pharmaceutical compositions comprising the claimed multi-arm siloxane-based molecules and an encapsulated therapeutic agent in combination with a pharmaceutically acceptable carrier. Methods of making and using the multi-arm siloxane-based molecules are also provided.