Supply shortages for generics

From a story titled Methotrexate Shortage: Doctors Urge More Production Of Scarce Cancer Drug:

Most of the medicines that have become scarce are sterile injected drugs that are the workhorses of hospitals and are normally inexpensive because they've long been available as generics.

The FDA says the main reason for the shortages is manufacturing deficiencies leading to production shutdowns. Shortages also are resulting from companies halting production of drugs with low profit margins, companies consolidating in the generic drug industry and supplies of some ingredients shrinking.

Keyword: Sen. Amy Klobuchar, D-Minn