Unhappy about reports that the shingles vaccine is in short supply, Sen. Amy Klobuchar has sent a letter to the FDA urging a quick resolution of the problem.

Even though the Centers for Disease Control has recommended that everyone over 60 get the vaccine, Zostavax, the leading manufacturer, says there won't be enough to go around until April.

In the letter to FDA Commissioner Margaret Hamburg, Klobuchar said:

"I urge the Food and Drug Administration (FDA) and the CDC to work with manufacturers, providers, and other stakeholders to find an immediate solution to the shortage of Zostavax. It is essential that the FDA act expediently to ensure that patients have access to the medications that are essential to their health and well-being."

Klobuchar also said she's introduced the Preserving Access to Life-Saving Medications Act, which would let the FDA "require  early notification from pharmaceutical companies whenever a factor arises that may result in a drug shortage. The American Society of Health-System Pharmacists currently lists 150 'medically necessary' drugs that are in short supply, which is double the number from five years ago."