Teva Pharmaceuticals Industries Ltd. (TEVA, TEVA.TV) and Active Biotech (ACTI.SK) said their experimental multiple-sclerosis pill laquinimod reduced relapse rate in a late-stage study.

Teva's American Depositary Shares were up 2.7% premarket. They had fallen 12% this year through Wednesday after climbing one-third in 2009.

The results, initial readings from the drug companies' two-year Allegro study, follow the U.S. approval in September of Novartis AG's (NVS, NOVN.VX) Gilenya, the first oral therapy for the disease. Previously, all multiple-sclerosis treatments were injected or given intravenously.

Teva and Active Biotech's trial enrolled 1,106 patients in 24 countries. Patients received either a once-daily oral dose or a placebo. In addition to succeeding in its primary goal, reducing relapses, the drug was also shown to achieve secondary endpoints such as reducing disability progression.

Laquinimod was found safe and well-tolerated, with the frequency of adverse events comparable to those receiving placebo.

Multiple sclerosis, the leading cause of neurological disability in young adults, is a progressive disease of the central nervous system affecting the brain, spinal cord and optic nerves.

-By Matt Jarzemsky, Dow Jones Newswires; 212-416-2240; matthew.jarzemsky@dowjones.com