Perhaps with the legalization of illegal drugs, even more hard core drugs like heroin, more education around the topic can be generated. For example when, where, and how to appropriately use a specific drug and the possible consequences of using these drugs. Most of the problems that come from using drugs is not using them correctly or not understanding what could go wrong. Also, this problem could be prevented by having an age limit for those who wish to purchase drugs and regulations on how much a person can purchase during a set amount of time. However, the real point should be that drugs isn't the biggest threat to the human population. Out of the top 19 health concerns in the world having childhood where they're underweight is the highest and alcohol (some may argue a legal drug) is ranked 3rd. While illicit drugs are ranked 18th. (https://ncadd.org/blogs/in-the-news/2-5-million-alcohol-related-deaths-worldwide-annually)