- Caffeine@
dir.yahoo.com/.../Specific_Drugs_and_Medications/Caffeine
- Cocaine@
dir.yahoo.com/.../Specific_Drugs_and_Medications/Cocaine
- Ephedrine@
dir.yahoo.com/.../Specific_Drugs_and_Medications/Ephedrine
- Guaranį@
dir.yahoo.com/.../Culinary_Herbs_and_Spices/Guarana
- Kava@
dir.yahoo.com/.../Herbs__Roots__and_Seeds/Kava
- Khat@
Learn about Khat, the stimulant drug and plant derivative of African origin. Sites offer plant origin, cultivation, usage and effects on human beings, treatment of khat dependency, and legal status of khat's usage in various countries.
dir.yahoo.com/.../Specific_Drugs_and_Medications/Khat
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