Each drug also has certain limitations in who can use them and which conditions they can treat.

But, individually, they have other indications for use.

By contrast, the safety and effectiveness of Lopressor have not been established in children.

Older adult taking blood pressure at home

Older adult taking blood pressure at home.Mariia Zotova / Getty Images

Who Should Avoid

Metoprolol cannot be used in everyone.

Certain conditions can contraindicate their use or increase the risk of potentially serious complications.

The treatment is started with a smaller initial dose and gradually increased until the desired effect is achieved.

Discuss the dosage with your healthcare provider and any considerations as to timing.

These vary by the condition being treated and other factors.

Side Effects and Risks

All drugs have side effects, including metoprolol.

National Library of Medicine.Compound summary: metoprolol.

Food and Drug Administration.Lopressor (metoprolol tartrate) tablet.

Food and Drug Administration.Toprol-XL (metoprolol succinate) extended-release tablets.

National Institute of Diabetes and Digestive and Kidney Diseases.Beta adrenergic blocking agents.

Dean L, Kane M.Metoprolol therapy andCYP2D6genotype.

In:Medical Genetics Summary.Bethesda (MD): National Center for Biotechnology Informations; 2025.

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