Epinephrine is available in an autoinjector delivery system. Epinephrine is available by prescription in an autoinjector. As of 2018, EpiPen is the only epinephrine autoinjector available for sale in Canada. The first epinephrine autoinjector was brought to market in 1983. It is provided in an autoinjector containing fourteen doses and is injected subcutaneously. The "Auvi-Q" epinephrine autoinjector uses this design. An exception is the personal insulin autoinjector used by diabetic patients. At its core is a repurposed insulin autoinjector. Palatin launched the Phase III trials with bremelanotide administered via an autoinjector. Chemical treatment was subsequently distributed in autoinjector form.