insulin

the curve of the lantus is not due to half-life. It's subQ. Active ingredient is insulin which as short-half life. The difference is the inactive ingredient that makes it release extendedly.
This is why you can take NPH (intermediate-acting) with regular insulin (short-acting, just plain insulin). NPH = cloudy insulin with some inactive ingredients that make it distribute to fat very slowly. That's why you can inject insulin with NPH and it won't damage NPH.
NPH injected to regular insulin => ruin it because you turn regular insulin into semi-NPH.
=> Clear before Cloudy.
But you don't want to draw it and leave it there for 24 hrs? Not sure! What about pre-mixed insulin pen?

Humulin (NPH/Regular insulin) => medium acting lasts longer for lunchtime, 2 injections but not really covers ppl in the correct way.

~Miss Student