Warning 1
Using hormones, such as the one in Mesterolone, has rarely been linked to benign (non-malignant) liver tumours. Very rarely, using hormones has been associated with some forms of liver cancer (malignant liver tumours). Liver tumours may lead to bleeding in the abdomen, which can be life-threatening. If you have any new “stomach” discomfort or pain that does not go away quickly, you must tell your doctor straight away.