I was wrong...thank you for pointing that out...wasn't sure on the BA of morphine itself, but most of the others are HORRIBLE transdermal...buprenorphine being one of them (which is 15% )...perhaps it has to do with the delivery method as well, as when I asked about making a morphine cream, I was told by sekio that TD was a horrible RoA...
it might also have to do with the fact that it's the HCl salt as opposed to the SO4 salt...I don't think they use the HCl salt at all in the US...unless they're using them for the proposed morphine patches that MIGHT hit the shelves...