Complex sentence: The capsule sold by GlaxoSmithKline but developed by Reliant Pharmaceuticals, contains esterified fish oils and is approved by the U.S. Food and Drug Administration to lower very high triglyceride levels.
Split into simpler sentences: The capsule sold by GlaxoSmithKline but developed by Reliant Pharmaceuticals, contains esterified fatty acidss. It is approved by the FDA (Food and Drug Administration) to lower very high triglyceride levels.