Equipoise is a brand-name injectable anabolic steroid used in veterinary medicine and for performance-enhancing purposes. It contains the active ingredient boldenone undecylenate, and is available in a 250 mg/10 mL injectable solution. It can be used to treat certain muscle wasting diseases, like those associated with HIV/AIDS. In addition, it is often used by athletes to increase strength and size, as well as improve their overall performance. Equipoise is usually injected into the muscle twice a week. Potential side effects include increased risk of fluid retention and a decrease in the body’s natural production of testosterone.