There are actually many reasons why drugs should not be legalized and some of them will even make those who use drugs stop and consider. If someone uses a drug knowing it is not good for them, it is called drug abuse. Even those who may not have a full blown addiction are still abusing drugs, even though they may not realize it.
Right now, drug dealers and drug cartels are reaping the benefits of those who buy drugs. Should drugs become legalized, the governments will take over the pricing and, of course, the taxing on them. Neither option is a favorable one. As things stand right now, with laws in place, there are those who are turned away from drugs simply because they are illegal. Legalizing drugs would expand an already overgrown drug problem across the world, and basically, people would have no reason not to try and use them.

If drugs are legalized more children will have access to them.
Marijuana used to be called a gateway to stronger drugs. Now, the government is thinking of legalizing it. Does it then mean they would legalize the stronger drugs as the demand grew? Again, the government would be pricing and taxing the drugs which means more people will destroy their lives trying to get the money to afford their own drugs. In effect, the government will be able to sell an individual some drugs, jail them for using those drugs and for instance, DWUI charges.
Children as young as 12 years old already are admitting in surveys that they have tried drugs. If drugs are legalized and more adults have the drugs, then more children will have access to them. The reason some drugs became illegal is because there used to be a time when a very few drugs were authorized. It leads to deaths, legal altercations, domestic abuse and all kinds of unfavorable circumstances. This is why they became illegal to begin with. The facts are not going to change, except for worsen if drugs become legal and more people will have ready access, including children. More people will become abusers or addicted when rehab centers are already full on a nearly constant basis. It seems odd that the government would spend years telling people that drugs kill and then turn around and want to become the world’s biggest drug dealer.