Interferon beta-1b (tradenames Betaferon, Betaseron, Extavia and ZIFERON) is a drug in the interferon family used to treat the relapsing-remitting and secondary-progressive forms of multiple sclerosis (MS). It is approved for use after the first MS event. It is administered by sub-cutaneous injection and has been shown to slow the advance of the affliction as well as reduce the frequency of attacks. It is believed that interferon-beta based drugs achieve their beneficial effect on MS progress via their anti-inflammatory properties. Studies have also determined that interferon-beta improves the integrity of the blood-brain barrier (BBB)—which generally breaks down in MS patients, allowing increasing amounts of undesirable substances to reach the brain...