I&#x27;m definitely not trying to be argumentative. But it&#x27;s interesting to look at what seems like an opposing viewpoint on this.<p>Here&#x27;s a psychologist who said that the body reacts by developing an _increased tolerance_ to drugs like caffeine and heroin, based on the time of day and situation in which those drugs are taken:<p><a href="http:&#x2F;&#x2F;blog.sethroberts.net&#x2F;2014&#x2F;02&#x2F;04&#x2F;philip-seymour-hoffmans-death-from-heroin-why&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blog.sethroberts.net&#x2F;2014&#x2F;02&#x2F;04&#x2F;philip-seymour-hoffma...</a><p>Again, I don&#x27;t doubt what you&#x27;re saying about the effects of caffeine on you. Not at all.<p>I bring this up because it&#x27;s an interesting counterpoint and I don&#x27;t know how to resolve it. I don&#x27;t know how to think about this.<p>The original article focuses on specific immune suppressing drugs. Maybe the body behaves differently in the face of drugs like caffeine or heroin?<p>Maybe the body reacts in one direction sometimes and the other at other times for some reason (?)