Yeah, delays caused by not passing clinical trials.
"The Medicines and Healthcare Products Regulatory Authority (MHRA) accepted Sativex’s safety and quality, but said that evidence of its efficacy was not yet sufficiently compelling. The company has already started the fresh trials of Sativex requested by the MHRA, but results are not due until spring 2006, delaying the launch of the drug to late 2006 or 2007."
Two words, Wolfie: Snake and Oil.
And yet approved in Canada and Europe. I'd say Uncle Sam's hand is up the ass of his puppets in the U.K.