[outofsalt]

Already Happening! You’ll be surprised at how long the FDA list is currently.
http://www.fda.gov/Drugs/DrugSafety/DrugShortages/ucm050792.htm
Stock up what you can.

[tbw2]

Then there are outright bans, such as good CFC propellant in inhalers, leaving asthma and COPD patients with more costly and less effective inhalers.