Opioid use disorder is a chronic, relapsing disease with both physical and psychiatric components. It is associated with economic hardship, social isolation, incarceration, increased rates of blood-borne infections such as HIV and viral hepatitis, adverse pregnancy outcomes, and increased mortality. According to the CDC, there were 33,091 deaths related to opioid overdose in the US in 2015, more than in any previous year. Several guidelines on the management of opioid use disorder have recently been published.

The recent increase in deaths due to overdose of heroin and prescription opioids in the US has renewed interest in the opioid antagonist naloxone, particularly in making it available to first responders and to relatives and close friends of persons using heroin or taking prescription opioids. IV or IM administration by healthcare professionals is preferred, but peripheral venous access may be difficult to obtain in IV drug abusers, and exposure to their blood may be hazardous.

A recent Medical Letter article reported renewed interest in the intranasal administration (off-label) of the opioid antagonist naloxone because of an increase in deaths from opioid overdose in the US.1 Now the FDA has approved a more practical alternative for emergency treatment of life-threatening opioid overdose in adults and children: a single-dose naloxone auto-injector (Evzio – Kaleo) for intramuscular or subcutaneous use.

Evzio will be available in kits containing two prefilled 0.4-mg auto-injectors with voice guidance and a "trainer" device that also has voice guidance, but does not contain medication or a needle. The manufacturer has not published a price for Evzio to date, but news reports indicate that each kit could cost hundreds of dollars, compared to about $20 for a standard 0.4-mg injectable dose of naloxone, which can be given intranasally.

1. Intranasal naloxone for treatment of opioid overdose. Med Lett Drugs Ther 2014; 56:21.

Download complete U.S. English article