Related by context. Frequent words. (Click for all words.) 61 amphetamine 56 Amphetamine 55 Amphetamines 54 amphetamines 54 stimulants 50 illicit drugs 50 stimulant 50 ketamine 48 Ketamine 48 ecstasy 48 Opiates 48 Stimulant 47 illicit opium 47 cocaine ecstasy 47 Subutex 47 highly addictive stimulant 47 prescription opioids 47 methamphetamines 46 Syabu 46 Stimulants 46 crystal methamphetamine 46 psychoactive substances 46 drugs 45 clandestine laboratories 45 Ephedrine 45 dopamine agonist 45 Topiramate 45 Opioids 44 narcotic 44 Mandrax 44 Nora D. Volkow 44 methylamphetamine 43 Erythropoietin 43 levamisole 43 dopamine agonists 43 MDMA 43 Opium cultivation 43 heroin 43 hypnotics 43 opiate 43 manic depressive illness 43 anticonvulsants 43 Buprenorphine 43 Methamphetamine 42 opioid painkillers 42 crystal meth 42 opioid analgesics 42 Primobolan 42 syabu 42 Heroin 42 Narcotics Bureau 42 psychotropic substances 42 addictive substances 42 Narcotics Control 42 methamphetamine 42 Narcotics Control Bureau 42 Cocaine 42 clandestine labs 41 Stilnox 41 anticonvulsant 41 cocaine 41 ecstacy 41 performance enhancer 41 ephedrine 41 Ecstacy 41 opiate addiction 41 Sibutramine 41 psychotropic drug 41 opiates 41 Dexedrine 41 stimulant medications 40 Ecstasy 40 herbal cannabis 40 MDPV 40 illicit substances 40 narcotics 40 L dopa 40 anti psychotics 40 precursor chemicals 40 Benzodiazepines 40 Acetone 40 drug 40 triptan 40 GHB 40 Mephedrone 40 highly addictive 40 naturally occurring substance 39 Crack cocaine 39 anabolic steroids 39 cannabinoids 39 vasodilator 39 Gabapentin 39 enhancing drugs 39 Campral 39 angina pectoris 39 Olanzapine 39 Risperidone 39 narcotic substances 39 Modafinil 39 endocannabinoids 38 appetite suppressants