Novel poly-esters, their preparation and pharmacological use thereof

摘要

The invention provides a polyester of a polyol, said polyol containing at least 3 hydroxyl groups and having a molecular weight of up to 20,000 at least 1 hydroxyl group in said polyol being in the form of an ester, with a poly-or copoly-lactic acid residue, each having a molecular weight of at least 5,000. The polyester is useful for parenteral depot formulations containing a pharmacologically active agent such as bromocriptine, ketotifen or co-dergocrine.