The same applies if you experience muscle pain, tenderness, weakness or cramps, yellow skin or the whites of your eyes turn yellow, or if you have pale poo and dark pee or severe stomach pain or a cough, feeling short of breath, and weight loss.
The NHS says that side effects can vary between different statins, but more common side effects include headaches, feeling sick, digestive system problems and low blood platelet count.
The health body notes that a review of scientific studies into the effectiveness of statins found around one in every 50 people who take the medicine for five years will avoid a serious event, such as a heart attack or stroke, as a result.
The NHS recommends maintaining cholesterol levels below 5mmol/L. In the UK, however, three out of five adults have a total cholesterol of 5mmol/L or above, and the average cholesterol level is about 5.7mmol/L, which can be a risk factor in heart disease.