Gemfibrozil is a drug used to lower cholesterol and triglycerides in people with high cholesterol. Other drugs, especially members of the HMG-CoA reductase inhibitor drug family, are more commonly used.
Safetychecker Summary
for Gemfibrozil
(for details about the summarized interactions, read the full article)
|
Coenzyme Q10* Vitamin E* |
|
|
Vitamin B3 (niacin) |
|
|
Red yeast rice* |
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| Side effect reduction/prevention |
None known |
| Reduced drug absorption/bioavailability |
None known |
Interactions with Dietary Supplements
Coenzyme
Q10
In a randomized study of 21 men with combined hyperlipidemia, ten to twelve weeks of
gemfibrozil therapy reduced coenzyme Q10 blood levels to the levels seen in healthy
men.1 The clinical significance of this finding is unknown.
Vitamin
E
In a randomized study of 21 men with combined hyperlipidemia, ten to twelve weeks of
gemfibrozil therapy reduced alpha- and gamma-tocopherol blood levels to the levels seen in
healthy men.2 The clinical significance of this finding is unknown and may reflect
a normal physiological response to a reduction in serum cholesterol levels.
Vitamin B3
(Niacin)
Niacin (not niacinamide) and gemfibrozil have successfully raised HDL (good) cholesterol
levels, both alone and in combination.3
Interactions with Herbs
Red yeast
rice (Monascus purpureus)
Monascus purpureus, a form of red yeast, is fermented with rice to produce a dietary
supplement, Cholestin®, that contains low levels of lovastatin, a drug otherwise available only by
prescription. Gemfibrozil taken with the prescription drug lovastatin has been reported to
cause rhabdomyolysis, a potentially life-threatening muscle disease.4 People taking
gemfibrozil should avoid lovastatin-containing products, including Cholestin®, until more
is known. The levels of lovastatin in Cholestin® are significantly lower than those given
of the drug as a single agent. Cholestin® also contains numerous other compounds that may
alter the interaction of lovastatin and gemfibrozil.
1. Aberg F, Appelkvist EL, Broijersen A, et al. Gemfibrozil-induced decrease in serum ubiquinone and alpha- and gamma-tocopherol levels in men with combined hyperlipidaemia. Eur J Clin Invest 1998;28:235–42.
2. Aberg F, Appelkvist EL, Broijersen A, et al. Gemfibrozil-induced decrease in serum ubiquinone and alpha- and gamma-tocopherol levels in men with combined hyperlipidaemia. Eur J Clin Invest 1998;28:235–42.
3. Zema MJ. Gemfibrozil, nicotinic acid and combination therapy in patients with isolated hypoalphalipoproteinemia: a randomized, open-label, crossover study. J Am Coll Cardiol 2000;35:640–6.
4. Garnett WR. Interactions with hydroxymethylglutaryl-coenzyme A reductase inhibitors. Am J Health Syst Pharm 1995;52:1639–45 [review].
5. Threlkeld DS, ed. Diuretics and Cardiovasculars, Antihyperlipidemic Agents, Gemfibrozil. In Facts and Comparisons Drug Information. St. Louis, MO, Facts and Comparisons, Feb 1997, 172h–2j.
6. Threlkeld DS, ed. Diuretics and Cardiovasculars, Antihyperlipidemic Agents, Gemfibrozil. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Feb 1997, 172h–2j.
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The information presented in Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over-the-counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires December 2003.