After finishing my prescribed Z-Pak, it started with my palms itching like crazy. Then the itch went to my forearms, my knees, tops of my feet, my neck, and now I am itching all over. I feel no better after taking the Z-Pak for bronchitis and I am left with this itch and rash. Benadryl helps but once it wears off, the itch is back. Any comments?