Researchers are developing an anti-opioid drug to protect against overdose for weeks or longer.

Scientists developing medication to help substance users for weeks Naloxone (brand name Narcan®) currently is used to rescue people from opioid overdose, but the protection is transient, lasting an hour or less. Opioid effects can persist for several hours, however, which puts the individual at risk of overdose re-emerging as effects of naloxone wear off. […]