The wide variation in the cost of some generic medications:

As predicted, the price that many insurers pay for generic Zocor has dropped dramatically. But the price that pharmacies charge patients who pay cash remains high in many locations, with wide variations by vendor. At online pharmacy walgreens.com, for instance, the price for 30 tablets of a 20-milligram dose of Merck & Co.’s Zocor is $149.99, compared with $89.99 for simvastatin, the generic version. And last week, the same dose of simvastatin cost $108.99 at CVS’s Web site, compared with $154.99 for Zocor. After a call from a reporter, CVS said it would drop its simvastatin price to $79.99, as part of an “ongoing price analysis.”

The moral? Shop carefully.