i was told not to be too pedantic with the snarel - every 12 hours is ideal, but if it's a out by a couple of hours due to another commitment, you're fine - i've been late twice in the three weeks i've been taking it, and no drama - mainly because i keep it in my bedside cupboard and wasn't home to take it!

i'm sure if you're only going to be a little late it shouldn't matter BW.