Classification of drugs has no long history. Many modern countries in recent decades classified different types of drugs in their judicial and legal criminal policy. The most popular classification in this respect is soft and hard drugs. The Netherlands was the pioneer in this respect. As the experiences show the third type named hybrid drugs can be known. One of the most important results of drug classification is decriminalization of some kinds of drugs besides imposing different sanctions for different class of illegal drugs. Nowadays many liberal countries classify drugs as above mentioned.