Rebif Gains New Multiple Sclerosis Rx Share Following Tysabri Withdrawal

Rebif is the leader in new prescription growth with a 22.4% share, an all-time high, at the end of March, Serono says. The company is focusing marketing of Rebif on efficacy, a message to which Tysabri helped draw attention. Serono expects Rebif to emerge as the global MS leader by 2006.