The term "allopathy" is used by those who don't see conventional medicine as the only or chief valid treatment, mainly coming from homeopathics but it's more common now than just that. The origins of the term are about how conventional medicine treats symptoms and not always the disease, or sometimes things totally unrelated to what is wrong. It has negative connotations, calling conventional medicine just another school of thought and a fallible one, so if you believe strongly otherwise I suppose it could be insulting.
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