Rapid Infusion of Ofatumumab in Patients With Previously Treated Chronic Lymphocytic Leukemia

The first dose of ofatumumab administered on Day 1 will be 300 mg to minimize infusion reactions. If the initial 300 mg dose of ofatumumab is well-tolerated, without occurrence of any infusion-associated AEs of \>= grade 3, on Day 3 ofatumumab will increase to 1000 mg IV. If the Day 3 dose was well-tolerated (i.e., no infusion-associated AE \>= grade 3), on Day 8 the ofatumumab dose will escalate to 2000 mg IV. To achieve the primary endpoint for this study, 20% of the 2000 mg ofatumumab dose only will be administered over the first 30 minutes and if tolerated the remaining 80% of the dose will be infused over the remaining 1.5/hours of each treatment. Ofatumumab doses, weeks 3-8, will remain at 2000 mg IV with no further dose escalations. If the Day 8 (Week 2) dose is tolerated all subsequent doses may be infused in the same manner.