Metoprolol-induced skin reactions
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Metoprolol-Induced Skin Reactions: Psoriasiform and Eczematous Lesions
Overview of Metoprolol-Related Skin Reactions
Metoprolol, a beta-1 adrenergic receptor blocker commonly used for hypertension and cardiac arrhythmias, has been associated with various skin reactions, most notably psoriasiform and eczematous lesions. Several case reports and studies have documented the onset or exacerbation of these skin conditions following metoprolol administration, highlighting the need for awareness among clinicians and patients Neumann1981Inamdar2019Adamu2017+2 MORE.
Psoriasiform Eruptions and Psoriasis Exacerbation
Multiple reports describe the development of psoriasiform eruptions—skin lesions that closely resemble psoriasis—shortly after starting metoprolol therapy. These reactions can occur in patients with or without a prior history of psoriasis. In some cases, metoprolol triggered new-onset chronic plaque psoriasis, while in others, it exacerbated pre-existing psoriasis that had been stable for years Inamdar2019Adamu2017Joy2019+1 MORE. The skin lesions typically present as thick, scaly, erythematous patches or papules, often on the hands, legs, or trunk Inamdar2019Adamu2017Joy2019+1 MORE. Discontinuation of metoprolol and initiation of topical corticosteroids usually led to improvement or resolution of the skin symptoms Inamdar2019Adamu2017Joy2019+1 MORE.
Eczematous Lesions and Other Skin Manifestations
In addition to psoriasiform eruptions, metoprolol has been linked to eczematous skin lesions. Oral provocation tests have confirmed the relationship between long-term metoprolol use and the development of both psoriasiform and eczematous skin changes in some patients . These findings suggest that metoprolol, like other beta-blockers, can induce a range of inflammatory skin reactions.
Mechanisms and Pathogenesis
The exact mechanisms behind metoprolol-induced skin reactions are not fully understood, but several theories exist. Proposed mechanisms include delayed-type hypersensitivity reactions, immunological changes such as impaired lymphocyte transformation, and alterations in intracellular signaling pathways like cyclic adenosine monophosphate (cAMP), which affects keratinocyte proliferation and differentiation Neumann1981Tatu2017. Biopsies from affected skin have shown excessive neutrophil activity in the dermis, supporting an inflammatory basis for these reactions .
Clinical Implications and Management
Clinicians should be vigilant for new or worsening skin lesions in patients taking metoprolol, especially those with a history of psoriasis or other skin conditions. Prompt recognition and discontinuation of the drug, along with appropriate dermatological treatment, can prevent more severe or persistent skin damage Neumann1981Inamdar2019Adamu2017+2 MORE. In some cases, switching to another beta-blocker may be possible without recurrence of the skin reaction Adamu2017Joy2019.
Conclusion
Metoprolol can induce or exacerbate psoriasiform and eczematous skin reactions, even in patients without a prior history of skin disease. Awareness of this potential side effect is important for timely diagnosis and management, ensuring better outcomes for affected patients Neumann1981Inamdar2019Adamu2017+2 MORE.
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