Abstract

We present a case of 48-year-old woman with relapsing remitting multiple sclerosis (MS), who switched disease modifying therapy from Copaxone to Fingolimod due to her clinical and radiological MS disease progression. Unexpectedly after 2.5 years of stable MS symptoms and liver function tests (LFTs), we noted deranged LFTs during routine testing. Additional investigations showed hepatitis C positivity, genotype 3. It is likely a case of hepatitis C reactivation secondary to prolonged immunosuppressive effects of Fingolimod. Although the increased risk of viral reactivation related to varicella zoster virus is known to occur with Fingolimod treatment, to our knowledge, this is only the second case of hepatitis C disease activity reported with Fingolimod treatment. We would like to raise the awareness of hepatitis C viral reactivation as a possible complication of prolonged immunosuppression with Fingolimod.