Metoprolol Extended Release (ER) is a medication most often prescribed to treat high blood pressure. It is also prescribed to treat patients suffering from angina and those who have experienced heart attacks. Like all medications, Metoprolol ER has potential side effects that may require medical attention.
According to the Mayo Clinic, side effects of Metoprolol ER that are considered common but not serious include bloating, dry mouth, gas, irritability and sleeplessness.
Serious side effects include blurred vision, chest pain, sweating and dizziness. A patient experiencing these symptoms should consult with a physician before continuing Metoprolol ER doses.
Severe side effects that require immediate medical attention include sudden fever, intense nausea or vomiting, bluish fingers or toes, and acute abdominal pain.
According to PDRHealth, before using Metoprolol ER a patient should advise her physician of existing medical conditions such as asthma, seasonal allergies, liver disease or a history of congestive heart failure.
Metoprolol ER has the potential to adversely interact with anti-inflammatory medications, barbiturates such as Phenobarbital, calcium channel blockers and oral diabetes medications.