According to CNN.com, "A controversial tool has emerged in the fight against opioid overdose deaths. It's a strip that allows people who use street drugs such as cocaine and heroin to test whether their drugs are laced with fentanyl." A video explaining the tool stated, "Let's say you had some drugs you were going to inject. ... If it tests positive, you have options. One, you can shoot half back into another sterile syringe, which may not only be life-saving but also cost-effective.