i delveloped a bad rash on my thighs about 2 weeks ago that is getting worse. i went to the dr and he thinks its some kind of allergice reatcion i came in contact with so he gave me prednisone( which has about 900 side affects) and some cream that is supposed to stop the itching, which has not helped at all. i took 4 tablets 10 mg each this morning, no side effects yet but i dont feel any better and im itching in more places. how long does it take for this medicine to work so the rash goes away? any help would be great

thanks, ron