Delaware health officials announced Monday that they will soon include fentanyl test strips in Narcan kits distributed to the public.

The effort is aimed at preventing accidental overdoses due to fentanyl consumption, the Division of Public Health’s Office of Health Crisis Response said in a news release.

Fentanyl is now the leading cause of drug overdose deaths in Delaware, found in more than 80% of fatal overdoses, officials said. There were 515 overdose deaths in Delaware last year, an increase of 15% from 2020, according to Division of Forensic Science data. Fentanyl was found in 83% of those deaths.

The test strips are highly sensitive and marijuana, cocaine, meth, ecstasy, and other substances can be tested for the presence of fentanyl, officials said. Most overdoses are unintentional, officials said and people may not realize how strong a drug is or that it contains fentanyl, which cannot be detected by sight, taste, smell or touch.

The Division of Public Health also distributes 10-pack fentanyl test strip kits through a free mail-order program.

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The Associated Press contributed to this article.