Rare Skin Reaction Reported With Tirzepatide
A single case report described possible lichen planus pigmentosus inversus following tirzepatide initiation.
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By
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Andrea Surnit
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May 7, 2026
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Clinical Scorecard: Tirzepatide's Surprising Skin Side Effect
At a Glance
| Category | Detail |
|---|
| Condition | Lichen Planus Pigmentosus Inversus |
| Key Mechanisms | Potential immune-mediated interface injury leading to pigment incontinence. |
| Target Population | Patients using tirzepatide, particularly those with Fitzpatrick skin types II-IV. |
| Care Setting | Dermatology outpatient setting. |
Key Highlights
- Temporal association between tirzepatide and lichen planus pigmentosus inversus.
- Notable presentation in a patient with Fitzpatrick skin type II.
- Lesions developed 6 to 7 months after initiating tirzepatide.
- Topical tacrolimus ointment resolved pruritus but hyperpigmentation persisted.
- No prior reports of lichen planus pigmentosus linked to GLP-1 receptor agonists.
Guideline-Based Recommendations
Diagnosis
- Consider biopsy for confirmation of lichen planus pigmentosus in patients on tirzepatide.
Management
- Topical treatments such as tacrolimus ointment may alleviate pruritus.
Monitoring & Follow-up
- Monitor for skin changes in patients receiving tirzepatide.
Risks
- Potential for drug-induced lichenoid eruptions, particularly within the first year of treatment.
Patient & Prescribing Data
Adult female patient with a history of weight loss treatment.
Patient opted to continue tirzepatide despite skin side effects.
Clinical Best Practices
- Educate patients on potential skin reactions when prescribing tirzepatide.
- Document any skin changes during follow-up visits for patients on GLP-1 receptor agonists.
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