Testosterone isocaproate (BANTooltip British Approved Name; TiCa), sold under the brand names Sustanon 100, Sustanon 250, and Omnadren 250, is an androgen and anabolic steroid medication and a testosterone ester which has been used as a component of mixed testosterone ester preparations.

Beware of allergic reactions as ester's are suspended in arachis oil (refined peanut oil) can in some cases cause allergic reactions.