Hello and thanks for the query
Both the drugs are used to lowers the level of cholesterol and triglycerides
in the blood. Rosuvastatin
was more efficacious than the same dose of atorvastatin
. There was no significant difference between rosuvastatin and a 4 times higher dose of atorvastatin. There were no significant differences between both for adverse events.
Also Rosuvastatin is more useful in diabetes
and reduced LDL-C levels significantly more than atorvastatin during the fixed-dose.
Rosuva reduces LDL and triglycerides in blood while Atorva reduces T. Cholesterol and Triglycerides more effectively according to the study.
In my opinion Rosivastatin is better than Atorvastatin. The change is made because may be your lipid components are normal in range and you may not need higher drug for that. It can be keep in standby to be used in future.
Rest consult your doctor for better reason for changing the drug.