Fluvastatin Sodium Extended-Release Tablets is a lipid-lowering medication indicated for primary high cholesterol and primary mixed dyslipidemia where dietary therapy has failed to achieve control. The specific dosage is as follows: For adult patients, the starting dose is 20mg or 40mg once daily, taken with dinner or swallowed at bedtime. For some people with very high cholesterol, or low sensitivity to the drug, the dose may be increased to 40mg twice daily. In patients with renal insufficiency, no dosage adjustment is necessary when taking fluvastatin extended-release tablets in mild to moderate cases, and high doses of this product are prescribed with caution in severe cases. Common adverse reactions include, mild gastrointestinal symptoms, insomnia and headache. It should be noted that it is contraindicated in people with hepatic impairment, pregnant women, and breastfeeding women. Before using the drug to regulate blood lipids, patients should adopt a standard cholesterol-lowering diet program. And use the drug under a doctor’s prescription, the exact dosage should follow the doctor’s instructions.