Metoprolol is a beta-adrenergic blocking agent that is used for treating high
blood pressure,
heart pain, abnormal rhythms of the
heart, and some neurologic conditions. Metoprolol is generally well tolerated. However, this drug may reduce blood flow to the hands and feet, causing them to feel cold. Smoking may worsen this effect. Some side effects include: symptoms of a very slow heartbeat (e.g.