im not sure - we dont have ultram in the UK. If you use the search feature on these boards then you'll find a number of posts giving advice on things to help alleviate the withdrawals etc.
I went through methadone withdrawals nearly a year ago - its the best thing i've ever done. When done properly that is.
i wish you all the best and hope you find the info you need.
take care & keep us posted as to how you are doing.