The risk of a fatal overdose is highest when an opioid or barbiturate is involved in a suicidal act because both medication types depress respiration. The likelihood of a fatal suicidal overdose increases with age; youth overdoses often involve toxins with low lethality. The researchers concluded that to reduce the risk of fatal suicidal overdose, drugs that are lethal when combined should be stored securely, and lethal drugs should be blister packed. Between 19.6% and 22.5% of suicidal drug overdoses involved benzodiazepines, and between 15.4% and 17.3% involved opioids. About 33.3% of fatal suicide overdoses . . .