Related by context. Frequent words. (Click for all words.) 61 psychoactive substances 60 psychoactive drugs 60 cannabinoids 59 addictive substances 58 acamprosate 58 psychoactive 58 alkaloids 57 Topiramate 57 relaxant 57 suppresses appetite 57 valerian 56 hallucinogen 56 stimulant 55 cannabinoid receptors 55 psychoactive ingredient 55 alkaloid 55 psychotropic 55 salicylates 55 scopolamine 55 sedative hypnotic 54 dopamine receptors 54 Ginkgo biloba 54 baclofen 54 Anti depressants 54 cannabinoid 54 medicinally 54 PMDD 54 Cannabinoids 53 vasomotor symptoms 53 hypnotics 53 anticonvulsants 53 pharmacological 53 mood altering 53 psychotic illnesses 53 pharmacologically 53 anticonvulsant 53 psilocybin 53 caffeine 53 dextromethorphan 53 naturally occurring substance 53 hallucinogens 53 endocannabinoid system 52 Opiates 52 addictive stimulant 52 anandamide 52 stimulants 52 anticholinergic 52 cardio protective 52 psychotic symptoms 52 endocannabinoids 52 active ingredient 52 opioid 52 gamma tocopherol 52 Essential oils 52 theobromine 52 Endorphins 52 menstrual pain 51 dopamine receptor 51 cardiac toxicity 51 stimulant medications 51 hallucinogenic 51 Melatonin 51 metabolic abnormalities 51 Gabapentin 51 bioactivity 51 appetite suppressants 51 theophylline 51 hormones estrogen 51 Salvia divinorum 51 Benzodiazepines 51 ginkgo biloba 51 nicotine 51 tricyclic antidepressants 51 tetrahydrocannabinol 51 licorice root 51 L dopa 51 phytoestrogens 51 Sildenafil 51 galantamine 51 manic depressive illness 51 neurochemistry 51 dopamine agonist 51 Anxiety disorders 51 prescription opioids 51 levamisole 51 neurotransmitter serotonin 51 nasal decongestant 51 anxiety insomnia 51 psychotic disorders 51 epicatechin 50 neurotoxicity 50 psychogenic 50 behavioral abnormalities 50 QT prolongation 50 thyroid hormones 50 facial flushing 50 thujone 50 nicotinic acid 50 potencies 50 SSRI antidepressants 50 Marinol