Time to shock up on any prescription meds you take. Shortages are increasing in the U.S. These shortages vary region-to-region. Here are a couple of state-related articles, followed by the national list maintained by the FDA.

Nevada (300+)
http://www.lasvegassun.com/news/2012/may/27/300-drugs-short-supply-southern-nevada-officials-w/

Utah (250+) & Oregon (Paramedics Using Expired Drugs)
http://www.katu.com/living/health/Oregon-paramedics-turn-to-expired-drugs-due-to-shortages-162325276.html

FDA's List of Shortages (300+)
http://www.fda.gov/drugs/drugsafety/drugshortages/ucm050792.htm