Conjunctival Pigmentation Following Minocycline Therapy

Area of Science:

• Ophthalmology
• Dermatology
• Pharmacology

Background:

• Minocycline is a widely prescribed tetracycline antibiotic for acne and rosacea.
• Known side effects include skin, nail, and scleral pigmentation.
• Ocular pigmentation is a less recognized but potential adverse effect.

Observation:

• A 43-year-old woman developed bilateral pigmented palpebral conjunctival cysts.
• These cysts appeared after 12 months of minocycline therapy for cystic acne.
• This represents one of the few reported cases of minocycline-induced conjunctival pigmentation.

Findings:

• The conjunctival pigmentation presented as distinct pigmented cysts.
• The condition was associated with long-term minocycline use.
• No new lesions were observed after discontinuing the medication.

Implications:

• Ocular pigmentation, specifically conjunctival cysts, should be considered in patients on long-term minocycline.
• Routine eye examinations may be necessary to detect this rare adverse effect.
• Discontinuation of minocycline appears to stabilize the condition.