Related by context. Frequent words. (Click for all words.) 55 substances 54 alkaloids 52 illicit substances 52 drugs 52 pharmacologically 52 highly addictive 51 addictive behaviors 51 psychoactive 51 Nicotine 51 addictions 51 alcoholics 51 nicotine 51 mood altering 51 illicit drugs 51 addictive 50 inhalants 50 psychotropic 50 addiction 50 hallucinogens 49 destructive behaviors 49 vices 48 opiates 48 stimulants 47 addicts 47 anticonvulsants 47 cough suppressant 47 caffeine 47 nicotine addiction 47 caffeinated drinks 47 compulsive behavior 47 drug addiction 47 Naltrexone 47 opiate 47 prescription meds 46 narcotic 46 caffeinated beverages 46 risky behaviors 46 cough syrups 46 hallucinogen 46 inhalant 45 altering substances 45 self medicating 45 benzodiazepines 45 Marinol 44 sweetened beverages 44 Ritalin 44 cannabinoids 44 opioids 44 psychotropic drugs 44 fattening foods 44 addicted 44 Ketamine 44 Ephedrine 44 Rohypnol 44 tobacco 44 neurotransmitters 44 dopamine receptors 44 alcoholism 44 dextromethorphan 44 psychiatric disorders 44 impulsive behavior 44 dopamine agonists 44 alchohol 44 behaviors 44 stimulant 43 depressants 43 neurotoxic 43 cravings 43 Cocaine 43 harmful substances 43 opioid 43 hallucinogenic 43 prescription drugs 43 alkaloid 43 depressant 43 unhealthy behaviors 43 cannabinoid 43 neuropsychiatric disorders 43 neurotoxins 43 tranquillizers 43 salvia 43 flavored tobacco 43 bath salts 43 heroin addicts 43 poisonous substances 43 cigarette smoking 43 anti depressant 42 chemical compounds 42 sugary foods 42 magic mushrooms 42 crystal meth 42 Oxycontin 42 refined sugars 42 addicting 42 Crack cocaine 42 OxyContin 42 hallucinogenic drugs 42 Methamphetamine 42 sugary snacks 42 cigarettes 42 Alcohol