A spider swallowed in butter

For jaundice, physicians reportedly prescribed a live spider wrapped in sweet butter and swallowed whole. The butter made the animal easier to take down; the spider was the supposed active ingredient. The remedy’s striking form reflects a medical world in which treatments could draw on animal substances as well as plants and minerals.

Why the cure did not match the illness

Jaundice is the yellowing of skin and the whites of the eyes when bilirubin, a yellow pigment produced as the body breaks down old red blood cells, builds up in the blood. It is a sign of an underlying problem, not a disease with one universal cause. A swallowed spider would not remove bilirubin or address the range of conditions that can make it accumulate.

The prescription is a reminder that a remedy’s place in medical practice did not guarantee that it worked. Without a stated date or explanation for this particular recipe, its rationale is uncertain; its vividness, however, is unmistakable. The butter was not a cure—it was the delivery vehicle for a spider.