Prozac is a medication that is designed to correct the chemical imbalance
that is believed to cause depression.
By stimulating the right areas of the brain, Prozac causes the brain to
restore the balance, therefore restoring the normal mood of the brain.

Hi, smp!  New poster here, a type 1 diabetic with a problem.
I use Lente (zinc delayed) insulin and so-called Neutral (i.e. fast
acting) insulin.   This worked very well up until ~3 weeks ago, when I
had to switch to a different manufacturer.