Hi Linda!  (From another Linda) I'm sorry you are having such a time with getting things under control.  I second what Nancy said about getting another doctor.  If this doctor can't even tell you what he is giving you, that sounds like a problem right there!  I can tell you that it IS safe to take Bendadryl and Zyrtec together.  While they are both for allergies, they are different classes of allergy meds making it safe to take together.  Benadryl is an antihistamine, while Zyrtec is not.  That's why they can market Zyrtec as non-drowsy. I've taken them on top of each other more than once.  good luck!