One or moreagentselected from A/B-cis furostane, furostene, spirostane and spirostene steroidal sapogenins and ester, ether, ketone and glycosylated forms thereof, including E and/or F ring opened derivatives thereof,is used to treat or prevent L-DOPA,dopamine agonistand/or dopamine enhancer induced disorders, such as L-DOPA induced dyskinesia (LID), which is a side effect of L-DOPA, dopamine agonist and/or dopamine enhancer therapies, e.g.for Parkinson's disease. The agent according to the invention may be administered in association with the therapeutic agent for the treatment of the Parkinson's disease or another dopamine- responsive disorder.
