The U.S. Food and Drug Administration approved the first generic versions of Johnson & Johnson's (JNJ) Levaquin antibiotic Monday, including versions by Mylan Inc. (MYL) and Teva Pharmaceutical Industries Ltd. (TEVA, TEVA.TV).

The FDA approved the generic, levofloxacin, for 12 companies in tablet, oral-solution and injectable-solution forms.

In its most recent quarterly results, Levaquin and another antibiotic, Floxin, accounted for $434 million of J&J revenue, or about 7.2% of total pharmaceutical product revenue.

The companies that the FDA approved to make the copycat Levaquin include Akorn Inc. (AKRX), Aurobindo Pharma Ltd. (524804.BY), Dr. Reddy's Laboratories Ltd. (500124.BY, RDY), Glenmark Pharmaceuticals Ltd. (532296.BY), Lupin Ltd. (500257.BY), Sagent Pharmaceuticals Inc. (SGNT), Torrent Pharmaceuticals Ltd. (500420.BY) and Wockhardt Ltd. (532300.BY), in addition to Teva and Mylan. The FDA also approved the generic for Hi-Tech Drugs Ltd.

-By Joan E. Solsman, Dow Jones Newswires; 212-416-2291; joan.solsman@dowjones.com