Dermatologic Adverse Effects of Chloroquine: A Review

Area of Science:

• Dermatology
• Pharmacology
• Internal Medicine

Background:

• Chloroquine is associated with various adverse effects across multiple organ systems.
• Dermatologic adverse effects of chloroquine are not comprehensively documented in existing literature.
• Hydroxychloroquine, a related drug, has had its dermatologic effects recently reviewed.

Purpose of the Study:

• To conduct a narrative review of English literature to understand chloroquine's dermatologic toxicity.
• To identify and analyze the spectrum of skin reactions associated with chloroquine use.
• To highlight the need for further research into chloroquine-induced dermatologic adverse events.

Main Methods:

• A narrative review of English-language studies was performed.
• Literature search focused on dermatologic adverse effects of chloroquine.
• Data on reaction types, onset, and resolution were extracted and analyzed.

Main Results:

• Pruritus was the most frequently reported dermatologic adverse effect, with 464 cases across 29 studies.
• All identified dermatologic reactions occurred within three months of initiating chloroquine.
• Many reported dermatologic effects were well-tolerated or resolved upon drug discontinuation.

Conclusions:

• Dermatologic adverse effects of chloroquine, while often manageable, necessitate further investigation.
• The timing of reactions suggests a need to monitor patients closely after chloroquine initiation.
• Future studies should clarify risks associated with specific conditions and treatment regimens to guide clinical practice.