When and why did pharmacies change from using the Eye of Horus to just the RX?

What pharmacies, where? Link? I know what the eye of Horus looks like in Egyptian hieroglyphics, but I don’t think I have ever seen it on any U.S. pharmacy, coast to coast.

Some time around 2500 b.c.e.? Here’s something on it from The Straight Dope I’m just googling things and posting them tonight. I’m on auto-pilot. Take it or leave it.

Merriam-Webster says, “Etymology: alteration of ℞, symbol used at the beginning of a prescription, abbreviation for Latin recipe, literally, ‘take.’”

Maybe it’s a cultural disconnect?

The Rx symbol according to some folk theories…originated from “The Eye of Horus” or perhaps with the sign for Jupiter who apparently was invoked to protect medicines/herbs. This has not been proven for fact and because of that, there is no real date as the direct descent of the Rx from the Eye of Horus has not been confirmed. It has been simply hearsay throughout the centuries. There doesn’t seem to be any contemorary references to the Rx and the Eye of Horus. Are you perhaps confusing the “Eye of Horus” with a cadeuceus which has been used and is still used in older pharmacies? That is the sign that has two snakes entwined on a staff.

Part of the symbol was a mortar-and-pestle.

Could you provide a reference that illustrates your question?

I do not recall ever seeing the eye of Horus used as a symbol for pharmacies. I came across this reference that says the Rx symbol was derived from the eye of Horus. I always thought the traditional symbol was the snake and stick