John H. Halpern

Self‐treatment of opioid withdrawal using kratom (<i>Mitragynia speciosa korth</i>)

Edward W. Boyer, Kavita M. Babu, Jessica E. Adkins et al. · Addiction · 2008 · 339 citations · Full text

Response of cluster headache to psilocybin and LSD

R. Andrew Sewell, John H. Halpern, Harrison G. Pope · Neurology · 2006 · 255 citations

Psychological and Cognitive Effects of Long-Term Peyote Use Among Native Americans

John H. Halpern, James I. Hudson, Deborah Yurgelun‐Todd et al. · Biological Psychiatry · 2005 · 179 citations

Long-term Peyote Use, Cognitive Effects, Anthropology +3

Residual neuropsychological effects of illicit 3,4-methylenedioxymethamphetamine (MDMA) in individuals with minimal exposure to other drugs

John H. Halpern, Harrison G. Pope, Steven Barry et al. · Drug and Alcohol Dependence · 2004 · 138 citations

Substance Abuse, Neuropsychology, Psychoactive Drug +12

Evidence of health and safety in American members of a religion who use a hallucinogenic sacrament.

John H. Halpern, Torsten Passie, Kimberly C Blackwell et al. · PubMed · 2008 · 130 citations