Do you have a link for that? All I can find is allergy relief.
I came across Fexofenadine some months ago when I was researching OTC Covid medications. There are numerous internet sites mentioning various histamine medications.
Many are lengthy studies with a number of treatment options, some including Fexofenadinea as a treatment.
Try googling “Fexofenadine as a Covid treatment,” take your time reading what comes up, & you will find references to Fexofenadine & Covid in a number of articles,but not every one.