Why not just say yes? American ethics boards are nervous about approving street drugs for use in research. Their concerns are more about politics than safety.
Kleiner
Kurt
K
D026724:Ethical Review; D028744:Ethics Committees, Research; D033161:Government Regulation; D006805:Human Experimentation / Q000941:ethics* / Q000331:legislation & jurisprudence; D006801:Humans; D013287:Illicit Drugs; D013313:Stress Disorders, Post-Traumatic / Q000188:drug therapy*; D014481:United States; D014486:United States Food and Drug Administration
D013287:Illicit Drugs