The preposterous nonsense known as homoeopathy has long exasperated doctors: but at whom, exactly, is their exasperation directed? At the homoeopaths themselves, or at the credulous and foolish public that persists in its patronage of such quackery on quite a large scale? According to a recent commentary in the New England Journal of Medicine, about 2 percent of Americans patronized homoeopaths last year.
The absurdity of homoeopathic theory – that diseases are cured by substances that produce similar symptoms to themselves, that those substances are more powerful the more dilute they became and so forth — was recognized by doctors very early on. Oliver Wendell Holmes wrote a famous polemic against it, as did Sir James Young Simpson, the discoverer of the anaesthetic properties of chloroform. But homoeopathy had one great advantage over its orthodox rival at the time of its development, the beginning of the nineteenth century, namely that at least it did no harm. This was an immense advantage, for the remedies used by orthodox medicine of the time were often worse than the diseases for whose cure they were employed.
The article in the Journal draws attention to the anomaly, as it sees it, of the lack of regulatory oversight of homoeopathic remedies sold over the counter. But one may ask why there should be such oversight of products that are sometimes so dilute that the chances are they do not contain a single molecule of the allegedly therapeutic substance. What harm can be done by such substances?