|Bioavailability||Close to 100%|
|Biological half-life||1.5 hours|
|Chemical and physical data|
|Molar mass||250.333 g/mol|
|3D model (JSmol)|
|Melting point||61 to 63 °C (142 to 145 °F)|
Gemfibrozil is the generic name for an oral drug used to lower lipid levels. It belongs to a group of drugs known as fibrates. It is most commonly sold as the brand name, Lopid. Other brand names include Jezil and Gen-Fibro.citation needed
Gemfibrozil was selected from a series of related compounds synthesized in the laboratories of the American company Parke Davis in the late 1970s. It came from research for compounds that lower plasma lipid levels in humans and in animals.
The exact mechanism of action of gemfibrozil is unknown, however, several theories exist regarding the very low density lipoprotein (VLDL) effect; it can inhibit lipolysis and decrease subsequent hepatic fatty acid uptake as well as inhibit hepatic secretion of VLDL; together these actions decrease serum VLDL levels; increases HDL-cholesterol; the mechanism behind HDL elevation is currently unknown.
- Reduce triglyceride levels 
- Reduce very low density lipoprotein (VLDL) levels
- Modest reduction of low density lipoprotein (LDL) levels
- Moderate increase in high density lipoprotein (HDL) levels
- GI distress
- Musculoskeletal pain
- Increased incidence of gallstone
- Hypokalemia (low blood potassium)
- Increased risk of cancer
- Hyperlipidemia (Type III): Gemfibrozil is the drug of choice for therapy.
- Hypertriglyceridemia (Type IV): Gemfibrozil, though not as effective as niacin, is better tolerated.citation needed
- Gemfibrozil should not be given to these patients:citation needed
- Hepatic dysfunction
- Gemfibrozil should be used with caution in these higher risk categories:citation needed
- Biliary tract disease
- Renal dysfunction
- Pregnant women
- Obese patients
- Anticoagulants: Gemfibrozil potentiates the action of warfarin and indanedione anticoagulants.citation needed
- Statin drugs: Concomitant administration of fibrates (including gemfibrozil) with statin drugs increases the risk of muscle cramping, myopathy, and rhabdomyolysis.citation needed
- Gemfibrozil inhibits the activation of the liver's Cytochrome P450 system, reducing hepatic metabolism of many drugs, and prolonging their half lives and duration of action.
Gemfibrozil has been detected in biosolids (the solids remaining after wastewater treatment) at concentrations up to 2650 ng/g wet weight. This indicates that it survives the wastewater treatment process.
- Rodney, G; et al. (1976). "The Hypolipidemic Effect of Gemfibrozil (CI-719) in Laboratory Animals". Proc. roy. Soc. Med. 69 (Supplement 2): 6–9. PMC . PMID 828263.
- "Gemfibrozil." WebMD.com Accessed 14 June 2014. http://www.webmd.com/drugs/drug-11423-gemfibrozil+oral.aspx