Teva Ends Work on Oral Copaxone: "Additionally, Teva is involved in MS pill research thanks to its recent acquisition of Ivax,. The Ivax-Serono product, called Mylinax, is a pill version of injectable cladribine, which treats a form of leukemia. 'Previous clinical trials had demonstrated the positive effect of injectable cladribine in patients with multiple sclerosis as well as a dramatic reduction in new lesion development,' Teva says. Last year, Serono commenced a two-year clinical trial of Mylinax involving 1200 MS patients.