Blister packs are a specific type of product packaging that consists of pre-formed molded plastic heat sealed over a printed paperboard card. Blister packs are most commonly used to package pharmaceutical products, but may also be used to package other small consumer goods. The paperboard card backing on blister packs may contain a layer of paper, foil or plastic as well. The pre-formed molded compartment on blister packs is clear, allowing the consumer to easily view its contents.

The single most common use for blister packs is packaging drug capsules or tablets in single dose units. Blister packs are used to package both pharmacy dispensed and over the counter medications. Typically, the capsule or tablet contained within the blister pack is pushed through the back of the attached card and thus, in many parts of the world, this type of packaging is referred to as Push Through Packs (PTPs). The individual compartments of a blister pack are often separated by perforation so that they can be torn away from the card individually.

Blister packs provide several benefits to the manufacturer and the consumer. This type of packaging helps manufacturers meet shelf-life requirements and also prevents tampering. Blister packs also enable manufacturers to print specific information on the back of each individual compartment. Consumers also benefit from this information. The only disadvantage to consumers is the difficulty of releasing the capsule from some blister packs. People with arthritis or other degenerative condition that impacts dexterity can have difficulty with blister packs.

Examples of other products that may be packaged and distributed in blister packs include contact lenses, hardware, small toys, and craft supplies. Numerous packaging companies supply manufacturers with various types of custom blister packs for packaging. A similar type of packaging, known as skin packs, involves sealing consumer goods to a paperboard card with a single sheet of plastic rather than individual plastic compartments.