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Pupil-sparing third nerve palsy associated with sildenafil citrate (Viagra)
1Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
Purpose:
To report unilateral pupil-sparing third nerve palsy after use of sildenafil citrate (Viagra).
Method:
Case report.
Results:
A 56-year-old man with a history of tobacco abuse was treated for erectile dysfunction. Viagra, 50 mg, was taken once without adverse effect. Three weeks later, the patient took a second dose of Viagra (50 mg); 36 hours later he experienced a complete pupil-sparing third nerve palsy. Erythrocyte sedimentation rate, blood glucose level, magnetic resonance imaging, and magnetic resonance angiography were normal.
Conclusion:
In a patient with microvascular disease, use of sildenafil may be associated with pupil-sparing third nerve palsy.