Are medicines from the Holocaust period valid today?

In the book of Adavit, chapter 5, Mishnah 3.
The house of Shammai was purified and the house of Hillel was impure. And so it is with tithes.
And the Rabbi explained, “The rabbi is a fool.”
A black seed that is called “Neilo” or “Bela”z, and is usually given with bread.
That which is accustomed to it does not bring me heartache.
Is this a virtue?
Is this medical advice based on the medical ‘science’ that was ‘known’ at the time?
Do you think there’s anything to it today?
Does the rabbi know and understand the Shema?
 
With your blessing and removing my heartache from within you.