This is the result of a comment made on this instructable:
I have some pills in a hard to open blister pack and her comment got me thinking I should be able to help her.
To open a blister pack using my method all you will need is a small flat screwdriver. On mine the blade is 1/8 inches wide.
Step 1: Make an Opening
Turn the blister pack vertical so the pill falls to the bottom.
Hold the screwdriver horizontal.
Pierce the foil with the screwdriver at the top of the blister.
Step 2: Prepare to Open the Blister
Turn the blister pack horizontal.
Insert the screwdriver horizontally through the blister on top of the pill.
Go a little past the blister so you have a place to apply leverage without breaking the pill.
Step 3: Finish the Process
Carefully lift the screwdriver to tear the foil and reveal the pill.