Study of the Efficacy, Safety and Tolerability of Oral CEP-701 in Patients With Severe Psoriasis

Dosages of oral CEP-701 20mg will be given twice daily. Escalation to the next higher dosage, CEP-701 40mg, may occur once the first 8 patients at the current dosage have completed 8 weeks of treatment without adverse events or laboratory abnormalities. Patients who remain in Cohort 1 will continue on the 20mg dosage until study completion.

Dosages of oral CEP-701 40mg will be given twice daily.Escalation to the next higher dosage, CEP-701 60mg, may occur once 8 weeks of treatment at the current dosage is completed without adverse events or laboratory abnormalities. Patients who remain in Cohort 2 will continue on the 40mg dosage until study completion.

Dosages of oral CEP-701 60mg will be given twice daily. Escalation to the next higher dosage, CEP-701 80mg, may occur once 8 weeks of treatment at the current dosage is completed without adverse events or laboratory abnormalities. Patients who remain in Cohort 3 will continue on the 60mg dosage until study completion.

Dosages of oral CEP-701 80mg will be given twice daily. Patients who have moved to Cohort 4 will continue on the 80mg dosage until study completion.