How do pravastatin and Lipitor differ chemically and in strength?
Pravastatin is a hydrophilic statin derived from fungal fermentation, while Lipitor (atorvastatin) is a synthetic, lipophilic statin. Atorvastatin is more potent, achieving greater LDL cholesterol reductions at lower doses—for example, 10 mg atorvastatin lowers LDL by about 39%, compared to 20 mg pravastatin's 30% drop.[1]
Which one has fewer drug interactions?
Pravastatin has minimal interactions because it doesn't rely on CYP3A4 liver enzymes for metabolism, making it safer with drugs like certain antifungals or antibiotics. Atorvastatin, metabolized by CYP3A4, carries higher interaction risks, potentially raising muscle damage odds when combined with those agents.[1][2]
What about side effects and tolerability?
Both cause muscle pain (myalgia) and liver enzyme elevations, but pravastatin reports fewer severe cases and is better tolerated in elderly patients or those with kidney issues due to its water-soluble nature and renal excretion. Atorvastatin links to slightly higher diabetes risk in long-term use.[2][3]
How do dosing schedules and costs compare?
Pravastatin comes in 10-80 mg doses, once daily anytime. Atorvastatin (Lipitor) uses 10-80 mg, best at night due to cholesterol synthesis peaks. Generic pravastatin costs less—around $10-20/month versus $15-30 for generic atorvastatin—though prices vary by pharmacy.[1]
When does Lipitor's patent expire, and are generics available?
Lipitor's main patents expired in 2011, with generics widely available since. Pravastatin generics launched earlier in 2006 after its patents ended.[4]
Which is preferred for specific patients?
Guidelines favor high-intensity atorvastatin (40-80 mg) for high-risk heart patients needing aggressive LDL cuts below 70 mg/dL. Pravastatin suits those on interacting meds, with mild hypercholesterolemia, or pregnancy concerns (category B vs. atorvastatin's X).[2][3]
[1] Drugs.com - Pravastatin vs Atorvastatin Comparison
[2] Medscape - Statin Comparison
[3] GoodRx - Statins Side Effects
[4] DrugPatentWatch.com - Atorvastatin Patents