Below, you'll find details on a few of the most popular illegal drugs in addition to their brief- and long-lasting effects. When it comes to looking for treatment, there are many alternatives to consider. You ought to try to find a treatment center that uses a full continuum of care and a variety of evidence-based therapies.Of the 27.1 million people who said they had actually utilized illegal drugs in the past month in 2015, more than 22.2 million reported utilizing marijuana. The variety of people 12 and older who utilized heroin in the past year increased from 404,000 in 2002 to 681,000 in 2013. The use of other illegal drugs, such as cocaine, meth and hallucinogens, has remained mainly the exact same considering that the mid-2010s.