Betamethasone valerate is a steroid ester that is betamethasone in which the hydroxy group at the 17alpha position has been converted to the corresponding pentanoate ester. It has a role as an anti-inflammatory drug. It is a steroid ester, a 20-oxo steroid, a 21-hydroxy steroid, an 11beta-hydroxy steroid, a fluorinated steroid, a 3-oxo-Delta(1),Delta(4)-steroid and a primary alpha-hydroxy ketone. It is functionally related to a betamethasone.