The government often fines and imprisons people who use illegal drugs. Are they doing this for your well being? Hell no! In reality, the government doesn't care about you at all. All they care about is taking money from its citizens. If they really cared about us, cigarettes, alcohol, and numerous pharmaceutical drugs that cause countless health problems and deaths would be illegal. Instead, the government only targets drugs such as marijuana that aren't making them money.
There are two solutions that would work much better than what we have in place now.
1. Make ALL drugs legal
This sounds extreme, but anything is better than the system we have in place now. Let people use whatever drugs they want. Let them practice free will. If a few people want to get together at a house and smoke pot, who cares? They are not hurting anybody. If people who use hard drugs like cocaine and meth end up killing themselves with an overdose, that is their choice. You have the freedom to choose what kind of life you want to live. No government has the right to interfere with that.
No laws are going to prevent people from doing illegal drugs. If you want people to stop using drugs, we should try this instead:
2. Make the World a Better Place
People often take legal and illegal drugs for a temporary escape from their problems.
Therefore, an awesome solution to the drug problem would be to make the world such a great place to live, no one would need to use drugs or alcohol. Will we see an ideal world like this in our lifetime? It's up to you.