Drug: Simvastatin | Class: HMG-CoA Reductase Inhibitor (Statin) | Brand: Zocor 10mg (Merck); Simvotin 10mg (Sun Pharma India) | Indication: Hypercholesterolaemia, cardiovascular risk reduction, secondary prevention | Dose: 10–40mg once daily in EVENING (short half-life — peak cholesterol synthesis overnight)
Quick Answer — What makes Simvastatin different from other statins?
Simvastatin must be taken in the evening — its short half-life means it must be present during peak nocturnal cholesterol synthesis. This differs from atorvastatin and rosuvastatin (any time of day). The 80mg dose is associated with increased myopathy risk.
Simvastatin – HMG-CoA Reductase Inhibitor (Statin)
Simvastatin contains Simvastatin, a hmg-coa reductase inhibitor (statin) for hypercholesterolaemia, cardiovascular risk reduction, secondary prevention. HPS trial: simvastatin 40mg reduced major vascular events by 25%; must take at night unlike atorvastatin/rosuvastatin; 80mg dose has myopathy concerns.
Product Information
| Attribute |
Details |
| Generic Name |
Simvastatin |
| Drug Class |
HMG-CoA Reductase Inhibitor (Statin) |
| Brand Reference |
Zocor 10mg (Merck); Simvotin 10mg (Sun Pharma India) |
| Indication |
Hypercholesterolaemia, cardiovascular risk reduction, secondary prevention |
| Standard Dose |
10–40mg once daily in EVENING (short half-life — peak cholesterol synthesis overnight). Maximum 40mg; 80mg only for established 12+ month patients |
| Form |
Tablet |
| Route |
Oral |
| Prescription |
Yes |
| Evidence |
HPS trial: simvastatin 40mg reduced major vascular events by 25%; must take at night unlike atorvastatin/rosuvastatin; 80mg dose has myopathy concerns |
How It Works
Competitively inhibits HMG-CoA reductase, reducing hepatic cholesterol synthesis and upregulating LDL receptors.
People Also Ask
When should Simvastatin be taken?
Simvastatin MUST be taken in the evening — its short half-life requires dosing aligned with peak overnight cholesterol synthesis for maximum efficacy.
What are statin muscle side effects?
Myalgia (muscle aching) affects 5–10% of statin users. Serious myopathy (elevated CK) is rare. Rhabdomyolysis is very rare at standard doses. Risk increases with high-dose statins, renal impairment, hypothyroidism, and drug interactions (cyclosporine, CYP3A4 inhibitors with simvastatin). Stop statins and check CK if significant unexplained muscle pain develops.
Does Simvastatin need to be taken lifelong?
For secondary prevention (post-MI, stroke), statin therapy is lifelong — stopping significantly increases recurrence risk. For primary prevention, risk-benefit reassessment at 3–5 years is reasonable. Never stop without discussing with your prescriber.
Does Simvastatin affect liver function?
Mild transaminase elevation occurs in 1–3% of statin users — usually transient and reversible. Serious hepatotoxicity is rare. Baseline LFTs are checked before starting statins; routine monitoring is not required unless symptoms develop.
Can Simvastatin interact with other medications?
Simvastatin has significant CYP3A4 interactions — avoid grapefruit juice, clarithromycin, azole antifungals, and HIV protease inhibitors at the 80mg dose. Atorvastatin and rosuvastatin have milder interaction profiles. All statins: caution with fibrates and niacin (myopathy risk).
Storage
Store at 15–30°C away from sunlight and moisture. Keep out of reach of children.
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