Lipitor to crestor dose conversionacting insulin all doses at 1:1 conversion. . titrate with caution (maximum dose: 20 mg/day). . . . . . . . . day, titrate with caution (maximum dose: 20 mg/day). . It's possible that in people with high cholesterol, Zocor at a higher dose will be just as effective as Lipitor. Atorvastatin (Lipitor ®): --Fluvastatin . My sister who had muscle weakness on Lipitor, is already getting cramps [on 40 mgm dose of] Crestor after only . . Rosuvastatin (CrestorBuy Lip... more