Fluvastatin Sodium - Indications, Contraindications, and Side Effects

Overview:

Fluvastatin sodium is a drug that is used to treat high cholesterol and high levels of fat in the blood. It was approved by the US FDA (Food and Drug Administration) in 1993. When taken along with a low-fat diet, regular exercise, and weight loss, it can help reduce the risk of heart attack and stroke.

It is a prescription drug. It is useful for people with heart disease or those at risk of heart-related problems. It can also be used in children (age group 10-16 years) suffering from heterozygous familial hypercholesterolemia (cholesterol level is dangerously high).

How Does Fluvastatin Sodium Work?

Fluvastatin sodium is a class of drugs known as statins. Statins inhibit the liver's production of cholesterol. This drug inhibits an enzyme (HMG-CoA reductase) that helps make cholesterol. When the levels of cholesterol go down, the body eliminates more bad cholesterol from the bloodstream. This prevents the buildup of cholesterol in the blood vessels. It helps protect the heart.

Uses of Fluvastatin Sodium

Fluvastatin sodium is used in conjunction with a healthy diet to:

• Reduce total cholesterol.

• Reduce triglycerides.

• Reduce bad cholesterol (LDL).

• Raise good cholesterol (HDL).

Who Should Not Take Fluvastatin Sodium?

Fluvastatin sodium should not be used in:

• People who are allergic to this medicine.

• Pregnant women.

• Breastfeeding mothers.

• People with active liver disease.

• People with high liver enzyme levels.

• People with severe kidney ailments.

Hypercholesterolemia

Available Doses:

It is available as:

• 20 mg and 40 mg capsules.

• 80 mg extended-release tablets.

• It can be taken with or without food.

• The full effect is seen after four weeks.

• Blood tests are done to adjust the dose if needed.

Dose Guidance

Mild Cholesterol Reduction: Start with 20 mg.

Higher Cholesterol Reduction:

• 40 mg once daily in the evening.

• Or 80 mg once daily.

• Or 40 mg twice daily.

Warnings and Precautions

• This medicine can rarely cause serious muscle damage, which can harm the kidneys.

• Older adults and people with kidney or thyroid problems are at higher risk.

• Stop the medicine if severe muscle pain or weakness occurs.

• It can increase liver enzymes. If signs of liver damage or yellowing of skin or eyes appear, stop the medicine.

• It may increase blood sugar levels.

• People with diabetes need close monitoring.

• Animal studies showed effects on the brain.

• Patients should be monitored during treatment.

For Patients

How Effective Is Fluvastatin Sodium?

• Studies show it can lower bad cholesterol by 15-33%.

• Extended-release tablets may lower it by up to 50 percent.

• Other statins like Atorvastatin may be stronger.

How to Take Fluvastatin Sodium?

• Take the medicine once or twice daily as prescribed.

• Take it at the same time each day.

• Swallow tablets whole.

• Do not crush or chew them.

• Do not stop the medicine without talking to your doctor.

Side Effects

• Serious Side Effects

  • Muscle pain or weakness.

  • Fever.

  • Nausea.

  • Severe tiredness.

  • Dark urine.

  • Yellow eyes or skin.

  • Swelling of the face, lips, or throat

  • Trouble breathing or swallowing

  • Unusual bleeding or bruising

• Common Side Effects

  • Headache.

  • Cough.

  • Heartburn.

  • Trouble sleeping.

  • Confusion.

  • Forgetfulness.

  • Sinus pain.

What to Tell Your Doctor Before Taking This Medicine?

Tell your doctor if you:

• Have allergies.

• You are pregnant or planning a pregnancy.

• Are breastfeeding.

• Have liver, kidney, thyroid, muscle, or heart problems.

• Have diabetes or seizures.

• Drink alcohol regularly.

• Tell your doctor about all medicines and supplements you take.

• Inform healthcare providers before surgery or dental work.

Precautions During Treatment

• Do not change the dose on your own.

• Follow a low-fat diet.

• Get regular blood tests.

• Report muscle pain or unusual tiredness.

• Seek immediate help for severe side effects.

• Follow a low-fat and low-cholesterol diet.

• Diet plans from cholesterol programs may help.

Missed Dose

• Take the missed dose as soon as you remember.

• If it is close to the next dose, skip it.

• Do not take two doses at once.

Overdose

In case of overdose or serious symptoms like seizures or breathing problems, get medical help immediately.

Storage

• Store at room temperature.

• Keep away from sunlight and moisture.

• Store in the original packaging.

For Doctors

Pharmacological Aspects of Fluvastatin Sodium

Mechanism of Action

Fluvastatin is an HMG-CoA reductase inhibitor responsible for converting HMG-CoA to mevalonate, a precursor of cholesterol. It acts by selectively and competitively inhibiting cholesterol biosynthesis, thus decreasing cholesterol levels in liver cells. This further stimulates LDL receptor production, thereby increasing LDL particle uptake. These biochemical processes ultimately reduce plasma cholesterol concentration.

Pharmacodynamics

Fluvastatin sodium is the first synthetic statin. It lowers bad cholesterol (LDL) and triglycerides in people with high cholesterol levels. It helps slow the buildup of fatty plaques in blood vessels and reduces the need for heart procedures. Compared to other statins, it stays in the body for a shorter time, binds strongly to proteins, has no active breakdown products, and enters the brain and spinal fluid only in very small amounts.

Pharmacokinetics

• Absorption: After an oral administration of Fluvastatin sodium, the peak concentration (C max) is achieved in less than one hour. The drug's bioavailability is around 24 percent following a 10 mg dose.

• Distribution: 98 percent of Fluvastatin sodium is bound to plasma proteins, and the mean volume of distribution is approximately 0.35 L/kg (liters per kilogram).

• Metabolism: Fluvastatin sodium undergoes hepatic hydroxylation and beta-oxidation.

• Excretion: After an oral administration, about 90 percent of Fluvastatin sodium is excreted in feces, and around five percent of the oral dose is recovered in urine. The half-life of the drug is approximately three hours.

Drug Interactions

• Some of the drugs that interact with Fluvastatin sodium include:

• Fluconazole.

• Posaconazole.

• Cyclosporine.

• Phenytoin.

• Warfarin.

• Niacin.

• Daptomycin.

• Fenofibrate.

• Primidone.

• Mifepristone.

Clinical Studies

Twelve placebo-controlled studies were conducted in patients with mixed dyslipidemia and primary hypercholesterolemia. 1621 patients were administered Fluvastatin sodium at daily doses of 20 mg, 40 mg, or 80 mg for 6 weeks. Results were evaluated after 24 weeks of treatment, demonstrating significant reductions in plasma LDL-C, TG, TC, and ApoB, and an increase in HDL-C. The most common adverse events leading to discontinuation were elevated transaminases, upper abdominal pain, dyspepsia, fatigue, and diarrhea.

Clinical studies were also conducted in pediatric and adolescent patients with primary hypercholesterolemia or a family history of premature ischemic heart disease. Treatment was started with 20 mg Fluvastatin sodium capsules, gradually increased every 6 weeks to 40 mg, then to 80 mg daily. The results demonstrated a significant decrease in LDL-C and TC.

A double-blind, randomized, multicentre, placebo-controlled study was performed involving 1677 patients with coronary heart disease who had undergone the procedure of Percutaneous Coronary Intervention (PCI) with a risk of recurrent cardiac events. 40 mg of Fluvastatin was administered twice daily, and the median duration of treatment was 3.9 years. The results showed a significant reduction (22 percent) in the risk of recurrence of cardiac events.

Nonclinical Toxicology

Animal studies showed no evidence that Fluvastatin sodium damages genes. Doses of 0.6, 2, and 6 mg/kg/day did not affect fertility or reproductive performance in female rats. In long-term animal studies, some rats developed growths or cancer in the stomach at much higher doses (6 to 24 mg/kg/day). However, no liver tumors or liver cancer were found.

Specific Considerations

• Fluvastatin sodium should not be used by pregnant women, women who may become pregnant, or breastfeeding mothers.

• It is safe and effective for children aged 9 to 16 years.

• Studies show that people over 65 respond to the medicine similarly to younger adults, but extra care is needed when prescribing it to older patients.

• Fluvastatin sodium is not recommended for people with liver disease or severe kidney problems. However, dose changes are usually not needed in patients with mild to moderate kidney disease.