gemfibrozil gem fib roh zuhl n medication (trade name Lopid) used to lower the levels of triglyceride in the blood Usage(s) For example, gemfibrozil seems to predispose people to develop gallstones. They include gemfibrozil, lovastatin, cholestyramine and colestipol. In addition, Michael is taking gemfibrozil. Synonym(s) Lopid