Clinical Trials Directory

Heritability of Opioid Effects: A Twin Study

Proposed twin study will test to what degree inter-individual differences in pain sensitivity and amount of pain relief in response to opioid therapy are inherited or alternatively, are due to environmental factors. This knowledge is important to guide future studies trying to explain such inter-individual differences. For example, finding that differences are largely due to environmental factors would discourage genomic studies and emphasize epidemiological studies.

Stanford is not currently accepting new patients for this trial. You may want to check to see if other locations are recruiting.



  • drug : Alfentanil
  • other : Saline placebo infusion

Phase: N/A


Ages Eligible For Study:

18 Years - 70 Years

Inclusion Criteria

Monozygotic or dizygotic twins ages 18-70

External Links

Contact information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305
Martha Tingle
Not Recruiting

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