Tough 2 decide! What an interesting question! Hard to say, steroids cause shrunken testicles, enlarged prostate, breast development, erectile dysfunction, reduced sperm count, severe acne, high blood pressure and strokes. Hallucinogens like LSD cause psychosis, flashbacks, schizophrenia, depression. Club drugs could be a lot of things, sudden death from arrhythmia is reported with several. All are dangerous!
All are dangerous. All these drugs are dangerous. However, we know the least about designer drugs, because they're constantly changing. The makers revise formulas frequently, to keep ahead of the law. People can have harrowing experiences with these drugs in the meantime. People ingesting street hallucinogens & steroids risk psychosis, violence, and other frightening outcomes also.