How To Get Rid Of Skin Rash?

I have been taking Eliquis (10 mg/day) for a week & have developed a skin rash which seems to get a little worse each day. I have applied 1% hydrocortisone cream alternately with calamine lotion. Additionally I have been taking the generic for Benadryl with little if any improvement. I would appreciate any suggestions. Thank you. gordon beu YYYY@YYYY