A Safety Confirmation Study on Lenalidomide With Dexamethasone In Japanese Patients With Previously Treated Multiple Myeloma

Inclusion Criteria

• Must understand and voluntarily sign the informed consent form
• Age ≥ 20 years at the time of signing the informed consent form
• Subjects with previously treated multiple myeloma defined as follows:
• Subjects must have received at least 1 prior anti-myeloma drug treatment regimen; and
• Considered to have progression of disease (PD) that occurred either during or following the completion of the last anti-myeloma treatment regimen utilized prior to enrollment into this study
• Measurable levels of M-protein in serum (greater than or equal to 0.5 g/dL [5g/L]) or urine (greater than or equal to 0.2 g excreted in a 24-hour collection sample)
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 - 2
• Must be able to adhere to the study visit schedule and other protocol requirements
• Females of childbearing potential (FCBP) must agree to use one or more of the following forms of contraception or abstain from heterosexual contact completely and have the male partners use a condom on the occasion of heterosexual contact in the following periods below:
• For at least 28 days before starting study drug (in particular, the subject must abstain from heterosexual contact for 2 weeks prior to prescribing lenalidomide).
• During the treatment phase (including the dose withholding period) For at least 28 days after the discontinuation/completion of the study drug (Methods of contraception)
• Birth control pills
• Intrauterine device (IUD)
• Bilateral tubal ligation (FCBP must be referred to a health care provider who is familiar with contraceptive methods, if needed).
• Male subject must agree to use a condom during sexual contact with female irrespective of pregnancy potential
• Subjects must agree that study drug must be immediately discontinued, if pregnancy or a positive pregnancy test does occur in a female study subject or the partner of a male study subject during study participation

Exclusion Criteria

• Pregnant or lactating females
• Subjects with a history of acute myocardial infarction within the past 6 months before starting the study drugs
• Subjects with any history or concurrent conditions of deep vein thrombosis or pulmonary embolus within the past 3 years before starting study drugs
• Subjects with tuberculous diseases, herpes simplex keratitis, systemic mycosis or other active infectious diseases
• Subjects with non-controlled diabetes, hypertension, digestive ulcer or glaucoma
• Subjects with posterior subcapsular cataracts
• Subjects with peripheral neuropathy of ≥Grade 2
• Subjects with any history or concurrent conditions which the Principal Investigator / subinvestigators consider inappropriate for participation in this study, and subjects with a serious disease or a mental disease, which is considered to become more risky if the subjects participate in this study.
• Subjects with a history of desquamative (blistering) rash while taking thalidomide
• Subjects with a history of using lenalidomide
• Subjects who have used thalidomide within 28 days before starting the study drugs
• Subjects with a history of hypersensitivity to dexamethasone
• Subjects who discontinued treatment due to grade 3 or 4 toxicity from high dose dexamethasone
• Subjects with a surgical wound after a visceral surgery performed recently
• Subjects who have undergone radiation therapy within 14 days before starting the study drugs
• Subjects who have used a chemotherapeutic agent, an immunomodulating agent or a study drug (a drug not commercially available) intended for the treatment of multiple myeloma (MM) within 28 days before starting the study drug
• Subjects with any history or concurrent conditions of malignancies, other than MM, unless the subject has been free of the disease for 3 years:
• Basal cell carcinoma of the skin,
• Squamous cell carcinoma of the skin,
• Carcinoma in situ of the cervix,
• Carcinoma in situ of the breast,
• Incidental histologic finding of prostate cancer Tumor, Lymph