Mild nausea, diarrhea, and abdominal pain none requiring discontinuation of the drug occurred in other patients. Longer-term studies of the drug at the dose of 20 mg/kg have been carried out. These showed that total body iron excretion ranged from 7.7-28.5 mg iron/d. These did not show any additional toxic effects and showed that liver iron decreased in 12 (57.1%), was unchanged in 8 (38.1%), and rose in 1 (4.8%) of 21 patients studied using the SQUID technique.