Suggest Cure For Itchy Lower Back

MY HUSBAND HAS ITCHY LOW BACK.. AND SIDES OF OUTSIDE THIGHS.. I HAVE BEEN USING LUBIDERM, AS THE PHARMACIST SAID THAT WOULD HELP, HOWEVER, IT HASN'T AND IT HAS BEEN TWO DAYS NOW.. KEEPS HIM AWAKE AT NIGHT. I THOUGHT I WOULD GO AND GET SOME BENEDRYL AND SOME CALMINE LOTION. SHOULD I TRY THIS OR CALL OUR DERMATOLIGIST TO GET AN APPT. THANK YOU..JUDIE