placebo effects and opioids

[Adriana C. Vidal]

Jason Kennerly <jkenner at cello.gina.calstate.edu> wrote:
>silmorat at usp.br writes:
>> A couple of years ago someone told me pacebo effects could be blocked by 
>> naloxone (or was it naltrexone?). I got back to the topic and now I need a 
>> reference. Can anyone help me? Thanks in advance.

Howard Fields at UCSF has studied it, and possibly others such as A.
Basbaum, and John Liebeskind, and john Levine.