Delivery vehicles containing rosin resins

摘要

Compositions containing a vehicle containing a rosin resin or derivative and a non-volatilized solvent or plasticizer. The compositions may be used to deliver a biologically active substance such as an active pharmaceutical ingredient. The concentration of rosin resin or derivative in the vehicle is sufficient to alter the release rate from the composition of a biologically active substance that is dissolved, dispersed, emulsified, or suspended in the vehicle.