How can buy this medication? I am in desperate need of it ## I have a rash under my arm pit and know it is spreading to my arms. I have used diprolene cream or Betameth cream before it is the only thing that works for me. I've had this problem on and off for years and have been to the best Doctor this is what works for me. ## Don, you might try to see if the generic form is available, which is Betamethasone Dip 0.05%. Should be available in a tube or bottle as an ointment, cream, or lotion (depending on what you were taking before). Check out drugstore.com and search for "Betamethasone Dipropionate". Also make sure you have a valid prescription handy. Hope this helps and good luck!