Related Experiment Video
Updated: Jun 26, 2026

06:08
Quantification of Hypopigmentation Activity In Vitro
Published on: March 6, 2019
Hydroxychloroquine-induced hyperpigmentation: a case report
M A Melikoglu1, M Melikoglu, U Gurbuz
1Department of Rheumatology, Physical Medicine and Rehabilitation, School of Medicine, Akdeniz University, Antalya, Turkey. mamelikoglu@gmail.com
Journal of Clinical Pharmacy and Therapeutics
|January 14, 2009
Summary
Antimalarial drugs, including hydroxychloroquine, can cause rare bluish-grey skin discoloration. This report highlights this localized mucocutaneous hyperpigmentation side effect.
Area of Science:
- Pharmacology
- Dermatology
- Rheumatology
Background:
- Antimalarials are widely used for malaria and rheumatoid arthritis.
- These drugs are generally well-tolerated with known side effects.
- Localized mucocutaneous discoloration is an infrequent adverse reaction.
Observation:
- This report focuses on hydroxychloroquine-induced localized mucocutaneous bluish-grey hyperpigmentation.
- A case presentation illustrates this specific side effect.
- The study includes a review of existing literature on the topic.
Findings:
- Hydroxychloroquine can induce localized bluish-grey to black skin and mucous membrane discoloration.
- This finding is based on a case presentation and literature review.
- The adverse reaction is distinct from more common antimalarial side effects.
Implications:
- Clinicians should be aware of this potential side effect of hydroxychloroquine.
- Early recognition can aid in managing patient expectations and treatment.
- Further research may clarify the incidence and mechanisms of this hyperpigmentation.
Related Concept Videos
Changes in Skin Color: Clinical Perspectives
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Jaundice
Jaundice, or icterus, is the yellow discoloration of the skin, sclerae, and mucous membranes. It happens when plasma bilirubin levels rise above 2.5-3 mg/dL, leading to bilirubin deposition in tissue.Bilirubin is a byproduct of hemoglobin degradation. In macrophages, hemoglobin breaks down into globin and heme. Globin is converted into amino acids, while heme is turned into biliverdin by heme oxygenase, which is then reduced to unconjugated bilirubin by biliverdin reductase.Unconjugated...

