DDInter1031 DDInter1376
Ledipasvir is a direct acting antiviral (DAA) medication used as part of combination therapy to treat chronic Hepatitis C, an infectious liver disease caused by infection with Hepatitis C Virus (HCV). HCV is a single-stranded RNA virus that is categorized into nine distinct genotypes, with genotype 1 being the most common in the United States, and affecting 72% of all chronic HCV patients. Treatment options for chronic Hepatitis C have advanced significantly since 2011, with the development of Direct Acting Antivirals (DAAs) such as ledipasvir. More specifically, ledipasvir is an inhibitor of the Hepatitis C Virus (HCV) Non-Structural Protein 5A (NS5A), which is required for viral RNA replication and assembly of HCV virions. Although its exact mechanism of action is unknown, it is postulated to prevent hyperphosphorylation of NS5A which is required
Ozanimod is a once-daily sphingosine 1-phosphate receptor modulator for the treatment of relapsing Multiple Sclerosis (MS) and inflammatory bowel disease. It was developed by Celgene (now acquired by Bristol-Myers Squibb) and was approved by the FDA on March 26, 2020.[L12573,L12582] The US approval was followed by the approval in Canada on October 2, 2020. In November 2021, ozanimod was also approved by the European Commission for the treatment of adults with relapsing remitting multiple sclerosis.[L39377,L39382] MS is a devastating inflammatory disease that often progresses and causes severe neurological, physical, and cognitive effects. Inflammatory bowel disease also a chronic inflammatory condition and can cause persistent abdominal pain, diarrhea, bloody stools, and vomiting. In clinical trials, Ozanimod has been shown to be well-tolerated and has resulted in a higher decrease in the rate of MS relapses than with intramuscular [interferon beta-1a], a current standard in MS therapy. Studies involving patients with inflammatory bowel disease have also shown promising results.[A189318,A189342]