Hallucinogens can be taken in pill or dissolvable strip form and have street names like Acid and Looney Toons. They act on the central nervous system and contain different chemicals depending on the drug. Hallucinogens can cause harmful effects like hallucinations and impact the nervous, cardiovascular, digestive, and respiratory systems. There are no medical uses for hallucinogens and mixing them with alcohol can have euphoric but dangerous effects. Long term use can negatively impact family and social relationships.