It only takes two milligrams of fentanyl, an amount as small as the tip of a pencil, to cause an overdose. And, it can be found in laced drugs such as heroin, methamphetamines, and cocaine—half of which contain a lethal dose. That's why measures like fentanyl test strips can be the difference in saving the life of a person who chooses to use drugs. We offer fentanyl test strips free of charge at several vending machines across the St. Louis area. Visit the link in our bio to find one near you.