A: Metoprolol belongs to a class of medications called beta blockers, which are used to treat high blood pressure, angina, and congestive heart failure. The most common side effects are dizziness, lightheadedness, or slow heart rate.
Other symptoms of testicular cancer may include: 1  Testicular pain. 2  A sudden gathering of fluid in the scrotum. 3  An abdominal mass or abdominal pain.  Loss of weight or appetite; fatigue; lower- back pain; chest lumps, breathlessness and 1  cough. Infertility.
Testicular cancer can also cause other symptoms, including a: 1  dull ache or sharp pain in your testicles or scrotum, which may come and go. 2  feeling of heaviness in your scrotum.  change in the texture or increase in firmness of a testicle.