20 Most Dangerous Illegal Drugs Right Now

3 – Heroin

Our third most dangerous illegal drug is heroin. It is an opioid drug made from morphine and is often injected. It is a depressant drug, which slows down the function of its user’s brain and nervous system. Heroin is one of the most addictive illegal drugs. In the short term, it can cause vomiting, drop your body temperature, narrow the pupil, and kill sex drive. Heroin overdose can cause dangerously low temperatures, slowed breathing, convulsions, and comma.