Tysabri Linked to Liver Injury

Biogen’s multiple sclerosis drug Tysabri has been linked to liver injury. The link was strong enough that the FDA posted a warning on its website. Biogen sent warning letter to doctors advising them of the potential liver damage. Signs of liver injury can manifest themselves as early as 6 days from initially taking the drug. Tysabri has also been used to treat Chron’s disease.