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Abstract
To report three cases in which herpes simplex keratitis developed after initiation
of latanoprost therapy.
Case report.
One patient with a history of herpes simplex keratitis had recurrence of herpes simplex
keratitis with latanoprost treatment, resolution when latanoprost was stopped, and
another recurrence when rechallenged with latanoprost. A second patient with a history
of herpes simplex keratitis had bilateral recurrence with initiation of latanoprost;
antiviral therapy could not eradicate herpes simplex keratitis until the latanoprost
was discontinued. The third patient with latanoprost-associated herpes simplex keratitis
cleared with the discontinuation of latanoprost and start of antiviral therapy; reinstitution
of latanoprost with prophylactic antiviral medication kept the cornea clear, but as
soon as the antiviral suppression was discontinued, herpes simplex keratitis reappeared.
Latanoprost, among its diverse pharmacologic effects, may mediate inflammation in
the eye. Prostaglandins may be a final common pathway for stimulating recurrence of
herpes simplex keratitis. Clinicians should be aware of this possible association.