FDA approves an alternative version of drug

WASHINGTON — Federal regulators on Friday approved another alternative version of Remicade, an expensive injected drug widely used for rheumatoid arthritis and other immune system disorders.

The U.S. Food and Drug Administration approved Renflexis, developed by Samsung Bioepis Co. of South Korea. Its U.S. partner, Merck & Co. of Kenilworth, N.J., will market Renflexis.