Platelet count Action (x 109/ l )< 50 Increase once weekly dose by 1 μg/kg > 200 for two Decrease once weekly dose by 1 μg/kg consecutive weeks Do not administer, continue to assess the platelet count weekly > 400 After the platelet count has fallen to < 200 x 109/l, resume dosing with once weekly dose reduced by 1 μg/kg