You can take half of a 20 mg Atorvastatin Calcium Tablet. The instructions recommend a regular starting dose of 10 mg once daily for this medication. The dose can be adjusted for 4 weeks or more, and the maximum dose is 80 mg once daily. Patients are advised to use the medication according to their condition and under the supervision of a doctor. Atorvastatin Calcium Tablets are mainly used for the treatment of hypercholesterolemia and coronary heart disease. Common adverse reactions include myalgia, diarrhea, nausea, elevated ALT, elevated liver enzyme levels, nasopharyngitis, arthralgia, pain in the extremities, urinary tract infections and other symptoms. It should be noted that atorvastatin calcium tablets are contraindicated in patients who are allergic to the components of the drug; in patients with active liver disease, including persistent elevation of liver aminotransferase levels of unspecified cause; in women who are pregnant or breastfeeding; in pre-pubertal or children less than 10 years of age for which the use of the drug is unclear; and should be used with caution in elderly patients. If you need to use atorvastatin calcium tablets, it is recommended to consult a professional doctor, follow the doctor’s instructions to standardize the use of medication, do not self-medication.