Hi,How soon before a long haul flight do I need to inject myself with Clexane. I was told  12 hours but have read anything from 4 hrs before to immediately beforehand. I am at low-moderate risk and have a problem with my foot which is suspected complex regional pain syndrome resulting in sensitivity and easily inflamed.
Its action is for 12 hrs. So anything 1-2 he is prior to flight is OK.  AO avoid prolong sitting and stand should be avoided