Different types of drugs and their effects.
D000697:Central Nervous System Stimulants; D006213:Hallucinogens; D006801:Humans; D006993:Hypnotics and Sedatives; D009294:Narcotics; D019966:Substance-Related Disorders
D000697:Central Nervous System Stimulants; D006213:Hallucinogens; D006993:Hypnotics and Sedatives; D009294:Narcotics