Adverse systemic reactions of topical cyclopentolate hydrochloride.

Systemic toxic effects of 2% cyclopentolate eye drops were studied in 66 adults. Out of these, 10 developed systemic toxic reactions. In 6 cases it was mild and in the remaining 4 cases the severity was moderate. Recovery was complete without any treatment. It is suggested that the use of 2% cyclopentolate drops should be restricted, and weaker concentrations applied with caution.