I am on a medication for my cholesterol and am worried about my liver. 

The new class of medications, the so-called statins, reduces the production of cholesterol within your liver. As part of this process, they can cause the leakage of liver enzymes or proteins into your blood stream. These are monitored every time your cholesterol is checked, which should be anywhere from three to six months if you are on regular treatment. However, these drugs do not cause permanent liver damage and at times the dosages are adjusted based on the liver blood tests.