3 Fates, 3 Plants

Each of the 3 Fates has a plant.  Here are the plants (I am making a guess not a fact!):
Belladonna (or another nightshade plant)
Opium poppies (still just guessing)
and Ephedra.

The combination of these 3 plants as a drug mixture can give twilight sleep.  I think the 3 Fates were 3 midwives who could give pain relief during child birth.  I think that the ancient Romans used this drug mixture.... maybe.

Here is something that I found on Wikipedia page = Scopolamine, under the heading, history:

"Scopolamine mixed with oxycodone (Eukodal) and ephedrine was marketed by Merck as SEE (from the German initials of the ingredients) and Scophedal starting in 1928, and the mixture is sometimes mixed on site on rare occasions in the area of its greatest historical usage, namely Germany and Central Europe."

There's a thing about the 3 Fates, they were from Rhineland.  Lots of ancient 3 Fates stuff was found in Rhineland.  Then this medicine called SEE was made in Germany...  Looks like a bit of historical detective work is needed.  Too bad I can't do German.  Maybe Google Translate can help.

Edit:  this could be wrong.  What if the 3 Fates represent 3 categories, not 3 specific plants?

...