What Is The Purpose Of Ratio-ectosone Cream?

I found a jar of Ratio-Ectosone Cream in our medicine cabient from july 30, 2008 and can not remember what it was prescribed for? 1) Is it still effective after almost 3 years? 2) what purpose does it serve?

Jay - 57 yrs old - 5'9" - 190 lbs - good health - itchy skin on arms only without any signs of rash or redness -