The shortage began last year when manufacturing experienced complications getting active ingredients, producing a quality product and keeping up with demand. The FDA reported 178 drug shortages last year and has said the number is even greater so far this year.
Related Articles on Drug Shortages:
Drug Shortages Increasingly Take Toll on Care
American Society of Anesthesiologists Present at FDA Workshop on Drug Shortages
Federal Government Scrutinizes Drug Shortages With ASA Backing
