> Tolerance isn't psychological. Are you just speculating? I haven't really studied psychology but have an interest in it. My understanding is that in a fami

> Tolerance isn't psychological. Are you just speculating? I haven't really studied psychology but have an interest in it. My understanding is that in a familiar setting the body starts compensating before the drugs are ingested. From http://www.ncbi.nlm.nih.gov/pubmed/1384078 http://www.ncbi.nlm.nih.gov/pubmed/1384078 > These rituals produced drug-opposite physiological responses which resulted in an attenuation of the effects of the drug. Thus, tolerance was observed when the subjects injected the opiate, but not when the same dose was received by un-signaled intravenous infusion. These results are consistent with a conditioning explanation for the observed drug tolerance.