Inclusion Criteria:

• Nonpregnant, nonlactating females
• Females of child bearing potential must have a negative human chorionic gonadotropin (HCG) test result within 60 days before the first dose of study material.
• Males and females must practice adequate contraception, in the judgement of the investigator, during the course of the study.
• Subjects must have a diagnosis of clinically definite Relapsing Remitting Multiple Sclerosis based on medical history, physical examination, laboratory test results, and neurologic examination. Alternatively, subjects may have clinically probable MS characterized by 1 attack and the presence of at least 4 lesions on MRI within 12 months before the initial baseline evaluation.
• Subjects must have an Expanded Disability Status Scale (EDSS) test result of less than or equal to 5.0 within 60 days before the first dose of study material.
• Subjects will have serum uric acid levels less than 5 mg/dl.
• Have 1 clinical relapse in the last year

Exclusion Criteria:

• Presence of any medical disability or laboratory test result that, in the judgement of the investigator, would interfere with assessment of the tolerability, safety, or efficacy of study material or would compromise the subject's ability to provide informed consent.
• Evidence of active infection characterized by requiring treatment with antibiotics within 7 days before the first dose of study material.
• Treatment with interferons, glatiramer acetate, lymphoid irradiation, cyclophosphamide, or with other immune modifying treatments within 3 months, or corticosteroids within 1 month before the initial baseline MRI assessment in this trial.
• Recent history (within the previous 2 years) of drug or alcohol abuse.
• Known allergy to Inosine products or history of anaphylaxis.
• Previous randomization into this study.
• Treatment with an investigational agent within 30 days before the first dose of study material.