What is a “blister pack” and why is it important?
A “blister pack” is a way of packaging medicines where individual pills are sealed in a “bubble” between two layers of material. The most common materials used for blister packs are cardboard, plastic and aluminum.
Misoprostol becomes less effective when the pills are exposed to heat and moisture. For that reason, misoprostol must be sealed in double-aluminum blister packs (aluminum on top and bottom), rather than cardboard or plastic. You are unlikely to find legitimate or effective misoprostol that is being kept in cardboard, plastic or as loose pills in a bottle.
A double-aluminum blister pack should look something like this. Be sure the aluminum is not opened on any side until you are ready to use the pills.