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Lichen associated with metformin.

Ahmed Zaïem1, Rym Sahnoun1, Talel Badri2

  • 1National Center of Pharmacovigilance, Tunis, Tunisia - Tunis El Manar University, Medicine Faculty, Tunis, Tunisia.

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Summary
This summary is machine-generated.

Metformin, a common diabetes medication, can exceptionally induce bullous lichen, a rare skin condition. This case highlights a potential adverse drug reaction in patients with diabetes mellitus.

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Area of Science:

  • Dermatology
  • Endocrinology
  • Pharmacology

Background:

  • Diabetes mellitus is a common metabolic disorder.
  • Metformin is a first-line oral hypoglycemic agent.
  • Adverse drug reactions can manifest in various ways, including dermatological conditions.

Observation:

  • A patient with diabetes mellitus developed a distinct blistering skin eruption.
  • The clinical presentation was consistent with bullous lichenoid dermatitis.
  • The eruption emerged following the initiation of metformin therapy.

Findings:

  • A diagnosis of bullous lichen induced by metformin was established.
  • This represents an uncommon but significant dermatologic side effect of metformin.
  • The patient's condition improved upon discontinuation of the offending agent.

Implications:

  • Clinicians should consider metformin as a potential cause of bullous lichenoid eruptions in diabetic patients.
  • Early recognition and withdrawal of metformin may be crucial for managing this adverse reaction.
  • Further investigation into the mechanisms of metformin-induced dermatoses is warranted.