We manufactured a chemical cousin of Valartan for years. The synthesis process is clear. Without good science and especially good engineering, impurities ensue.
This is no doubt what happened in this case.
Its important to review the list of approved sources that are included in my last LINK.
I see you are in Ohio. Boehringer, perhaps? (MICARDIS,Telmisartan).
FReegards!
Funny...didnt see the name “ENTRESTO,....that contains valsartan..
Thank you ZE.
My mfg is not on the list, which is unchanged from when this first broke.
Good science, good engineering.