Lescol Xl (Fluvastatin Sodium)

• Lescol Xl is a statin that acts on cholesterol metabolism to manage lipid disorders and reduce cardiovascular risk.
• Hypercholesterolemia: reduces low‑density lipoprotein (LDL) cholesterol and total cholesterol levels.
• Primary familial hypercholesterolemia: helps achieve target lipid levels in genetically predisposed patients.
• Cardiovascular disease prevention: lowers the risk of myocardial infarction and stroke in patients with elevated cholesterol.

• Fluvastatin Sodium competitively inhibits HMG‑CoA reductase, the key enzyme that catalyzes the conversion of HMG‑CoA to mevalonate in the hepatic cholesterol biosynthesis pathway. By blocking this rate‑limiting step, hepatic cholesterol synthesis declines, leading to up‑regulation of LDL receptors and increased clearance of circulating LDL‑cholesterol, thereby reducing total and LDL cholesterol concentrations.

Common Side Effects

• Headache: mild to moderate intensity.
• Nausea: occasional gastrointestinal upset.
• Abdominal pain: discomfort in the stomach area.
• Myalgia: muscle aches without weakness.
• Diarrhoea: loose stools.
• Elevated liver enzymes: mild transaminase increase.

Serious or Rare Side Effects

• Rhabdomyolysis: severe muscle breakdown with risk of renal failure.
• Acute liver injury: marked elevation of hepatic enzymes or jaundice.
• Severe allergic reaction: rash, angioedema, or anaphylaxis.
• Myopathy with weakness: significant muscle weakness.
• Acute renal failure: secondary to muscle breakdown products.
• Hepatotoxicity: liver dysfunction requiring discontinuation.

Before initiating therapy, consider patient‑specific factors and monitor appropriately.

• Liver function monitoring: obtain baseline and periodic liver enzyme tests.
• Renal impairment: adjust therapy in patients with reduced kidney function.
• Drug interactions: review concomitant medications that affect statin metabolism.
• Pregnancy and lactation: avoid use unless benefits outweigh potential risks.
• Elderly patients: start with the lowest effective dose and monitor closely.
• Store at ambient temperature (below 25°C): keep in the original container, protect from moisture and light.

Fluvastatin may interact with several medicines; assess the interaction potential before prescribing.

Major Interactions (Avoid)

• Strong CYP3A4 inhibitors (e.g., itraconazole, clarithromycin): may increase fluvastatin exposure.
• Gemfibrozil: markedly raises risk of myopathy.
• Cyclosporine: enhances statin plasma concentrations.
• High‑dose niacin: increases risk of hepatotoxicity.
• Certain antiretrovirals (e.g., protease inhibitors): elevate statin levels.

Moderate Interactions (Monitor Closely)

• Other statins: cumulative risk of muscle toxicity.
• Warfarin: may potentiate anticoagulant effect.
• Digoxin: possible increase in serum digoxin.
• Macrolide antibiotics (e.g., erythromycin): modest increase in statin levels.
• Fibrates (except gemfibrozil): monitor for muscle symptoms.