Discontinue use if onset of sore throats, bruising or bleeding, mouth ulcers, fever, malaise, neutropenia occur. Monitor white cell counts in clinical evidence of infection. Perform liver function tests following onset of hepatic disorder (upper abdomen pain, anorexia, general pruritus). Regularly perform complete blood count in confused patients or w/ poor memory. Intrathoracic goitre. Temporary discontinue at the time of radio-iodine administration. Concomitant use w/ propylthiouracil. Mild to moderate hepatic insufficiency. Galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption. Women of childbearing potential. Elderly ≥65 yr.