Related by context. Frequent words. (Click for all words.) 63 psychoactive 61 tetrahydrocannabinol THC 60 cannabinoids 60 monoamine oxidase 59 alkaloid 58 anandamide 58 cannabinoid 58 psilocybin 57 cannabinoid receptors 57 alkaloids 57 psychotropic 56 hallucinogen 56 suppresses appetite 55 synthetic cannabinoids 55 dopamine receptor 55 Cannabinoids 54 Salvia divinorum 54 SAMe 54 neuropeptide 54 orexin 54 salvia divinorum 53 Bupropion 53 MAO B 53 PDE5 53 tetrahydrocannabinol 53 psychoactive ingredient 53 apolipoprotein 53 scopolamine 53 acamprosate 53 endocannabinoid system 53 ibogaine 53 baclofen 53 aldehyde 53 endocannabinoids 52 oxidase 52 alpha lipoic acid 52 salicylates 52 psychoactive drugs 52 hallucinogenic 52 THC 52 dopamine receptors 52 Capsaicin 52 pharmacological 52 naturally occurring compounds 52 leucine 52 nicotinamide 52 theobromine 52 L dopa 51 naturally occurring substances 51 neurotransmitter serotonin 51 Dextromethorphan 51 Dietary fiber 51 retinoic acid 51 dextromethorphan 51 BACE1 51 peroxisome proliferator activated 51 phenylalanine 51 nicotinic acid 51 epicatechin 51 Vitamin B6 51 addictive substances 51 naturally occurring substance 50 pharmacologically 50 vitamin B3 50 Topiramate 50 estrogen hormone 50 gamma tocopherol 50 mood altering 50 tyrosine 50 body metabolizes 50 phytoestrogens 50 nicotine 50 L arginine 50 polyphenol 50 tocotrienols 50 isomers 50 psychoactive substances 50 Quercetin 49 contains sildenafil 49 sulforaphane 49 soy isoflavones 49 metabolite 49 synthetic narcotic 49 salvia 49 ellagic acid 49 bioactivity 49 alpha tocopherol 49 Fructose 49 enantiomers 49 vasodilator 49 prostaglandin 49 theophylline 49 neurochemical 49 glutamate receptors 49 prescription opioids 49 MDMA 49 ceramide 49 relaxant 49 Marinol 48 catechin 48 PYY