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  1. Commonly Abused Illicit, Prescription, and Over-the-Counter Drugs - Screening for Unhealthy Drug Use in Primary Care in ... 
    https://www.ncbi.nlm.nih.gov/books/NBK558172
    ... hepatitis, and other infectious diseases from shared needles. Khat † ( Catha edulis ) Abyssinian Tea, African Salad, Catha, Chat, Kat, ...
  2. Detailed Methods - Interventions to Prevent Illicit and Nonmedical Drug Use in Children, Adolescents, and Young Adults: ... 
    https://www.ncbi.nlm.nih.gov/books/NBK558019
    ... ti,ab,kw #11 (cocaine or methamphetamine* or khat or “Catha edulis”):ti,ab,kw #12 (heroin or opium ... tiab] OR cocaine[tiab] OR methamphetamine[tiab] OR khat[tiab] OR “Catha edulis”[tiab] OR Heroin[tiab] OR opium[tiab] ...