Fenofibric acid

Cholesterol and Triglyceride Management

Fenofibric acid is primarily prescribed to treat high levels of fats in the blood. It is used to:

• Lower triglycerides: It helps reduce high levels of triglycerides, which are a type of fat found in the blood.
• Lower LDL cholesterol: It can help decrease "bad" cholesterol (low-density lipoprotein).
• Increase HDL cholesterol: It is used to raise "good" cholesterol (high-density lipoprotein).

Specific Conditions

Healthcare providers may prescribe this medication for the following conditions:

• Mixed dyslipidemia and primary hyperlipidemia: These are conditions where a person has unhealthy levels of various types of cholesterol and fats.
• Severe hypertriglyceridemia: This involves very high levels of triglycerides, which can increase the risk of developing pancreatitis (inflammation of the pancreas).

This medication is intended for use in combination with a low-fat, low-cholesterol diet and regular exercise. It is typically recommended when lifestyle changes alone have not been sufficient to reach target lipid levels.

Mechanism of Action

Fenofibric acid works by activating a specific protein in the body called peroxisome proliferator-activated receptor alpha (PPARα). This protein plays a key role in regulating how the body processes and clears fats from the blood.

When this receptor is activated, it triggers several changes in the body:

• Increased fat breakdown: It increases the activity of an enzyme called lipoprotein lipase, which breaks down triglycerides (a type of fat) circulating in the blood.
• Reduced fat production: It helps decrease the liver's production of very low-density lipoprotein (VLDL), which is a precursor to certain types of cholesterol.
• Improved good cholesterol: It can help increase the levels of high-density lipoprotein (HDL) cholesterol, often referred to as good cholesterol, by stimulating the production of specific proteins.

By lowering high levels of triglycerides and improving the balance of cholesterol, the medication helps manage the amount of fatty substances that can build up in the blood vessels. It is intended to be used alongside a low-fat diet and regular exercise.

Common Side Effects

Some people may experience mild side effects while taking fenofibric acid. These often do not require medical attention unless they persist or become bothersome. Common symptoms include:

• Headache
• Heartburn or stomach pain
• Nausea, diarrhea, or constipation
• Back pain or joint pain
• Runny nose or sneezing

Serious Side Effects

Seek medical attention immediately if you experience any of the following serious symptoms:

• Muscle issues: Unexplained muscle pain, tenderness, or weakness, especially if you also have a fever or unusual tiredness. This may be a sign of a serious muscle breakdown condition.
• Liver or pancreas problems: Severe pain in the upper stomach that may spread to the back, nausea and vomiting, yellowing of the skin or eyes (jaundice), or dark-colored urine.
• Blood clots: Swelling, warmth, redness, or pain in one leg; sudden chest pain; or difficulty breathing.
• Allergic reactions: Skin rash, hives, peeling or blistering skin, or swelling of the face, lips, or throat.
• Gallstones: Severe pain in the upper right side of the abdomen.

Fenofibric acid may also affect laboratory test results, including liver enzyme levels and kidney function tests. Your healthcare provider will likely monitor these through regular blood work.

Contraindications

• Severe kidney disease or receiving dialysis
• Active liver disease, including primary biliary cirrhosis
• Gallbladder disease
• Nursing mothers
• Known hypersensitivity to fenofibric acid or fenofibrate

Muscle Toxicity

Serious muscle damage, known as rhabdomyolysis, has been reported. The risk is increased in patients over age 65, those with diabetes, kidney impairment, or hypothyroidism. Using this medication alongside statins may further increase the risk of muscle-related side effects.

Organ Function and Monitoring

Liver Function: This medication can cause elevations in liver enzymes. Periodic blood tests are used to monitor liver health during treatment.

Kidney Function: Increases in serum creatinine levels have been observed. Monitoring is especially important for patients with pre-existing kidney issues.

Gallstones

Fenofibric acid may increase cholesterol excretion into the bile, which can lead to the development of gallstones. Treatment should be discontinued if gallstones are confirmed.

Blood Clots

There is an increased risk of blood clots, such as deep vein thrombosis and pulmonary embolism, associated with the use of fibrate medications.

Blood Count Changes

Reductions in white blood cell counts, hemoglobin, and hematocrit may occur. These levels usually stabilize with long-term use but may require monitoring.

Pregnancy

There are no adequate and well-controlled studies of fenofibric acid use in pregnant women. In animal studies, high doses of the medication were associated with adverse effects on fetal development. Because the risks to a human fetus are not fully known, fenofibric acid should be used during pregnancy only if the potential benefit to the mother justifies the potential risk to the fetus. Individuals who are pregnant or planning to become pregnant should consult their healthcare provider to discuss treatment options.

Breastfeeding

It is unknown if fenofibric acid passes into human breast milk. Due to the potential for serious adverse reactions in nursing infants, manufacturers recommend that women do not breastfeed while taking this medication and for five days after the final dose. A healthcare provider can help determine whether to discontinue nursing or stop the medication based on the mother's medical needs.

Available Forms

Fenofibric acid is provided for oral administration in the following formats:

• Delayed-release capsules: These are designed to release the medication after it passes through the stomach.
• Tablets: This form provides the medication in a standard solid oral format.

The specific form prescribed may depend on the brand or generic version selected by a healthcare provider. Both forms are intended for oral use and are typically taken once daily.

FDA Approval and Indications

The U.S. Food and Drug Administration (FDA) first approved fenofibric acid in 2008. It is approved for use in adults, in combination with dietary changes, to treat the following conditions:

• Severe hypertriglyceridemia (very high levels of triglycerides).
• Primary hyperlipidemia or mixed dyslipidemia (high levels of LDL cholesterol or low levels of HDL cholesterol).

Safety Communications and Labeling Updates

In 2011, the FDA issued a safety communication regarding the results of the Action to Control Cardiovascular Risk in Diabetes (ACCORD) Lipid trial. This large clinical study evaluated whether adding a fibrate medication to a statin (another type of cholesterol drug) provided more protection against heart attacks and strokes than a statin alone.

The trial found that the combination of fenofibric acid and a statin did not significantly reduce the risk of major cardiovascular events compared to using a statin by itself. Following these findings, the FDA required updates to the drug's labeling to inform healthcare providers and patients that a cardiovascular benefit has not been established when fenofibric acid is added to statin therapy.

Regulatory Status

Fenofibric acid is available only by prescription. It is not currently subject to a Risk Evaluation and Mitigation Strategy (REMS) program. However, the FDA continues to monitor its safety through post-marketing surveillance, particularly regarding its effects on liver enzymes and muscle tissue. Regulatory guidelines recommend that patients undergo periodic blood tests to monitor liver function while using this medication.

Generic and Brand Options

Fenofibric acid is available as a generic medication and under brand names such as Trilipix and Fibricor. Generic versions are generally more affordable than their brand-name counterparts and are widely available at most pharmacies.

Insurance Coverage

Most commercial insurance plans and Medicare Part D cover the generic form of fenofibric acid. The out-of-pocket cost will vary based on the specific plan's formulary, which categorizes drugs into different cost tiers. Brand-name versions may require higher copays or prior authorization from an insurance provider.

Price Variables

The total cost of the medication can be influenced by several factors:

• Dosage Form: The price may vary depending on whether the prescription is for delayed-release capsules or tablets.
• Pharmacy Selection: Different pharmacies may have different retail prices or participate in different discount programs.
• Supply Duration: Filling a larger quantity, such as a 90-day supply, may reduce the overall cost per dose in some cases compared to a 30-day supply.