Tonact EZ 20 Tablet is used to treat high cholesterol levels. It contains Atorvastatin and Ezetimibe, which helps to decrease the production of cholesterol that may build up on the blood vessels (arteries) of the heart, brain, and other parts of the body. By lowering cholesterol levels, it prevents the risk of heart diseases such as heart attacks and strokes in the future. Also, it prevents the absorption of cholesterol from the intestines. It may cause side effects such as nausea, stomach pain, constipation, muscle pain, or headache. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.