Long before recorded history, medical practitioners were treating patients with potions, herbs, and incantations.
the Eye of Horus, or udjat
Horus was the falcon-headed Egyptian god of health and prosperity. The left eye had special meaning for the Egyptians, and they used each part of the symbol to measure not only food and land, but ingredients in their medical preparations. The left eye signified the restoration of health and may have evolved into the present Rx notation.
Dr. Munyon, homeopathist
Samuel Hahnemann (1755-1843) concluded that drugs causing the original symptoms of a disease could be curative if given in smaller amounts, an idea he expressed in his hallmark phrase similia similibus curantur, or “like cures like.” Homeopathists, like Dr. Munyon, thus produced vials containing small doses of drugs that caused symptoms similar to the diseases they were supposed to cure.