Although many people tolerate metoprolol (Lopressor® and Toprol-XL®) well, it is not free of dangerous risks. Because this medication is not suitable for everyone, make sure you talk to your healthcare provider about possible dangers that may apply to you. For instance, make sure your healthcare provider is aware of any other medical conditions you may have and any other medications you are taking (including non-prescription medications, vitamins, and herbal supplements) before starting treatment with this drug. Dangers of metoprolol include potential side effects. Some of the most common metoprolol side effects include:
- A slow heart rate
Although side effects of metoprolol tend to be minor, there are some serious side effects of the medication that require immediate medical attention. Contact your healthcare provider right away if you experience problems such as unexplained swelling or sudden weight gain, chest pain, or difficulty breathing.
Other warnings apply to women who are pregnant or breastfeeding, as well as people who have certain allergies (including allergies to foods, dyes, or preservatives). Also, you may not be able to take metoprolol if you have certain medical conditions, such as kidney disease, diabetes, or hyperthyroidism.
(Click Metoprolol Side Effects and Metoprolol Warnings and precautions for more information on potential dangers to be aware of before starting treatment with this medication. These articles also explain what to tell your healthcare provider before using metoprolol and who may not be able to safely use the medication.)