Inclusion Criteria:
Must understand and voluntarily sign an informed consent form
Must be able to adhere to the study visit schedule and study protocol requirements
- Females of childbearing potential (FCBP)[1] must have a negative urine pregnancy test at screening (Visit 1). In addition, FCBP must agree to use two of the following adequate forms of contraception methods such as oral, injectable, or implantable hormonal contraception; tubal ligation; intrauterine device; barrier contraceptive with spermicide or vasectomized partner while on study. A FCBP must agree to have pregnancy tests every 4 weeks while on study medication.
- Males (including those who have had a vasectomy) must agree to use barrier contraception (latex condoms) when engaging in sexual activity with FCBP
Exclusion Criteria:
History of clinically significant (as determined by the investigator) cardiac, endocrinologic, pulmonary, neurologic, psychiatric, hepatic, renal, hematologic, immunologic, or other major disease
- Any condition, including the presence of laboratory abnormalities, which places the subject at unacceptable risk if he/she were to participate in the study or confounds the ability to interpret data from the study
- Pregnant or lactating females
- History of active tuberculosis (TB)infection within 3 years prior to the screening visit. Infections which occurred > 3 years prior to entry must have been effectively treated
- History of incompletely treated latent (as indicated by a positive PPD [purified protein derivative] skin results) TB infection
- Clinically significant abnormality on the chest x-ray (CXR) at screening
- Psoriasis flare within 30 days of screening, as defined by protocol
- Use of systemic therapy for psoriasis within 28 days of Visit 2 (Baseline).
- Topical therapy as defined in the protocol Adalimumab, etanercept, efalizumab or infliximab use within 56 days of Visit 2 (Baseline)
- Alefacept use within 180 days of Visit 2 (Baseline)
- Phototherapy (UVA, NB-UVB, PUVA) within 28 days of Visit 2 (Baseline)
- Use of any investigational drug within 28 days of Visit 2 (Baseline), or 5 half lives if known (whichever is longer)Clinically significant abnormality on 12-lead ECG at screening
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