Extension of Prior Study Evaluating Safety and Tolerability of Two Doses of Betaseron® to Treat Relapsing-remitting Multiple Sclerosis

Inclusion Criteria:

Signed and dated statement of informed consent
Completion of Protocol 307000A
Negative serum pregnancy test results
Agreement to adequate contraception, for female patients

Exclusion Criteria:

Pregnancy or lactation
History of alcohol or drug abuse
Inability to administer subcutaneous injections either by self or by caregiver
Medical, psychiatric or other conditions that compromise the patient's ability to give informed consent, to understand the patient information, to comply with the study protocol, or to complete the study
Any significant change in the patient's medical condition after enrollment in Study 307000A which would have lead to his/her exclusion from participation that study