Context:
Western governments have
built waivers into the sanctions regime– aimed at persuading Tehran to curb its nuclear programme – in an effort to ensure that essential medicines get through, but those waivers are not functioning, as they conflict with blanket restrictions on banking, as well as bans on "dual-use" chemicals which might have a military applicati
More:
http://www.guardian.co.uk/world/2013/jan/13/iran-lifesaving-drugs-international-sanctions