What is difference between Pravastatin and Pravastatin sodium?

Not a thing. Its the chemical salt of pravastatin, that's all it means. Don't worry because its salt, because its not the salt you eat and have to limit. Words like sodium, potassium and hydrochloride after a med name just denotes the chemical salt. I think pharmacies should either use the full name all the time or not use it, because it confuses people when one time its one name and the next its another.