Some parents are sticker shocked by a huge price hike on one back-to-school essential.
Parents with kids who need EpiPens for allergic reactions often have to buy a new one every school year. A two-pack of pens that cost $100 five years ago, just went up to more than $600.
Critics say many families can't afford them at the new price. The manufacturer says EpiPens are priced at market value.