after a light meal or snack.
If you use the liquid form (suspension), take it on an empty stomach—either one hour before or two hours after eating—and use a proper measuring device.
Avoid large amounts of grapefruit juice (generally more than about 1.2 liters per day), as it can increase medication levels in the blood.
If you miss a dose and it has been more than 12 hours, skip it and resume your normal schedule. Do not double the next dose.
Attend all scheduled blood tests so your doctor
Taking Atorvastatin: What You Really Need to Know About Side Effects and Safe Use