Abstract: A parenterally deliverable composition is provided, comprising an aqueous medium having dispersed therein, in solid particulate form, a steroidal drug in a therapeutically effective amount. The aqueous medium comprises one or more wetting and/or suspending agents in an amount effective to provide controlled flocculation of the drug, at least one of the wetting and/or suspending agents being susceptible to oxidative degradation. The composition further comprises, as a component thereof or as an adjunct thereto, means for protecting the oxidative degradation susceptible agent from oxidative degradation.