I have no personal experience as I have never been on the patch. However, there is a site that will compare various strengths of various meds, which may be able to help you. Check out:
<http://www.talaria.org/provtoolsF.html>http://www.talaria.org/provtoolsF.html
I'm not positive, but you may be able to find the equivalents on that site.
Good luck, and pain-free days.
Nancy in NB