What are the side effects of metoprolol tartrate tablets?

Metoprolol tartrate tablets may cause side effects such as bradycardia, hypotension, bronchospasm, headache, and vomiting.

1. Bradycardia: Metoprolol tartrate tablets inhibit cardiac β-receptors, thereby slowing heart rate. In some patients, this may lead to bradycardia; severe cases may present with dizziness, fatigue, transient visual loss (amaurosis), or even syncope.

2. Hypotension: This medication reduces myocardial contractility and cardiac output, resulting in decreased blood pressure. Some patients may experience symptoms of hypotension—including dizziness, blurred vision, nausea, and fatigue—particularly when higher doses are administered or when used concomitantly with other antihypertensive agents.

3. Bronchospasm: The drug also exerts a degree of inhibitory effect on β₂-receptors in bronchial smooth muscle, potentially triggering bronchospasm and airway narrowing, leading to dyspnea and wheezing.

4. Headache: Some patients may experience dizziness or headache after taking metoprolol tartrate tablets. These symptoms may result from the drug’s effects on the central nervous system or from reduced cerebral perfusion secondary to changes in blood pressure or heart rate.

5. Vomiting: Metoprolol tartrate tablets may irritate the gastrointestinal mucosa, causing digestive symptoms such as nausea, vomiting, and decreased appetite. While these symptoms are generally mild, they may be more pronounced in certain individuals.

It is recommended that this medication be used strictly under medical supervision; self-administration without professional guidance is not advised. During treatment, maintain a balanced diet and avoid spicy, irritating foods—such as hotpot or chili peppers—as they may interfere with drug efficacy.