TRENTON, N.J. – Ranbaxy Pharmaceuticals Inc. has recalled dozens of lots of its generic version of cholesterol drug Lipitor because some may contain tiny glass particles, the latest in a string of manufacturing deficiencies that once led U.S. regulators to bar imports of the Indian company's medicines.

Ranbaxy, a subsidiary of Ranbaxy Laboratories Ltd., India's biggest drugmaker, is operating under increased scrutiny from the U.S. Food and Drug Administration because of quality lapses at multiple Ranbaxy factories over the past several years. The FDA also has alleged the company lied about test results for more than two dozen of its generic drugs several years ago.

On Friday, Ranbaxy posted a notice on its U.S. website, saying it's recalling 10-, 20- and 40-milligram doses of tablets of atorvastatin calcium. That's generic Lipitor, the cholesterol fighter that reigned for years as the world's top-selling drug.