We report an 80-year-old woman who intentionally drank an antiseptic solution, with subsequent hypertension, acute pulmonary edema and respiratory failure requiring intubation. On the fourth hospital day, chest radiography showed resolution of pulmonary edema and she was extubated successfully. This antiseptic solution contained naphazoline, an imidazoline derivative with alpha adrenergic effects. We speculate that naphazoline induces intense vasoconstriction and thereby causes hypertension and pulmonary edema. In summary, we present a case of a rare toxicity and would like to remind emergency physicians that acute pulmonary edema can be caused by over-the-counter drugs.