Drug eruption due to bosentan in a patient with systemic sclerosis.

We present the case of a 60-year-old female patient with systemic sclerosis complicated by pulmonary hypertension. Ten days after the initiation of treatment with bosentan, high fever and skin eruptions were noted. In the previous reports, the frequency of drug-induced skin eruptions has not been well documented. Since the use of bosentan is expected to increase, we should be aware of the previously unknown adverse effects as well as skin eruptions.