The generic name of this medication is apomorphine and brand name is Apokyn. The active ingredient of this medication is apomorphine hydrochloride. It is mainly used for treating loss of control of body movements; like muscle stiffness; lethargic movement or difficulty moving associated with advanced Parkinson disease.

Apomorphine is a type of dopaminergic agonist, a morphine derivative (but does not actually contain morphine, or bind to opioid receptors). Apomorphine is a relatively non-selective dopamine receptor agonist, which possibly has slightly higher affinity for D2-like dopamine receptors. Historically, apomorphine has been tried for a variety of uses including psychiatric treatment of homosexuality in the early 20th century. Currently, apomorphine is used in the treatment of Parkinson's disease and (under the name Uprima) erectile dysfunction. It was also successfully used in the treatment of heroin addiction, a purpose for which it was championed by the author William S. Burroughs. It is a potent emetic, meaning that it should not be administered without an antiemetic such as domperidone. The emetic properties of apomorphine are exploited in veterinary medicine to induce therapeutic emesis in canines that have recently ingested toxic or foreign substances.

For treatment of erectile dysfunction, it is believed that dopamine receptors in the hypothalamic region of the brain are the main target, as although dopamine receptors in the penis do facilitate erection, they do so far more weakly than those in the brain.

Apomorphine is clear as a liquid but stains green. Therefore care must be taken to avoid splashes. Apormophine does not remain stable for more than 24 hours in a plastic container, so glass syringes are used.