Also referred to as club drugs, party drugs consist of a large number of addictive substances. Some of these dangerous substances include Ketamine (Special K, Vitamin K, Jet), Methamphetamine, Rohypnol, LSD, and amyl nitrate inhalant. They can be extremely dangerous when taken with alcohol. These drugs can make a person completely addictive and can sometimes be even life-threatening. In a few cases, it may even lead to the death of the addict.