busy pediatric clinic, we have noticed there are a number of patients, forexample, calling in, tondering wherey can procure their epipens. >> reporter: calls to 2,000 pharmacies from boston to san francisco revealed almost every single one had no epipens or just a few in stock. she called moreochan eight l pharmacies before she found one, th one set her insurance will cover. >> i said, put it on hold, i will be there in the gorning, i there, last box. >> reporter: mylin says it's exploring options with its manufacturing partner, pfizer, to stabilize supply. pfizer says it's experiencing delayed shipments due to process changesnd cited supply of third-party components in the manufacturing process. epipen isn't the only option on the market. there's also the click and the avicue, b it's the most dominant. >> the school prefers the epipe' because t what they have trained their staff in how to administer. >> reporte just this week fda approved the first generic competitor to the ipen. mylin introduced its own generic at t end of 2016. this is the first directly bstitutable productold by another com