Rituxan (Rituximab) is utilized as one of the treatment options for rheumatoid arthritis (RA), Non-Hodgkins Lymphoma (NHL), Chronic Lymphocytic Leukemia (CLL), and Wegner’s Granulomatosis (WG).
In 2016 Rituxan had over $4 billion in sales in the United States, making it a lucrative area for the development of biosimilars. As of the publication of this article, Rituxan has two biosimilars awaiting FDA review in 2018 and one product in study (see Executive Summary Table below). All the biosimilars currently being developed have focused their studies on RA and NHL, which represents the primary usage of rituximab in practice and the more highly prevalent conditions for which Rituxan is approved.
Based on the available data it can be assumed that the FDA will approve the biosimilars for use with RA and NHL, but not for CLL and WG. Both Truxima® and Rixathon® have interchangeability data with Rituxan specifically within the treatment for rheumatoid arthritis. It is unknown whether this data is part of the FDA submission for these products in 2018, but if they are in the review, it can be expected that these products may be one of the first products to be listed as interchangeable. Since these are one of the first products that could be potentially reviewed for interchangeability it will be of interest to see if the FDA will generalize this to the drug or just within the RA indication.
For our complete review of Rituxan (Rituximab) Biosimilars:
Executive Summary of Evaluation for Rituximab Pipeline:
|Regulatory||Status||Marketed||Submitted for Approval||Not Submitted||Submitted for Approval|
|Indications||Non-Hodgkins Lymphoma (NHL)||Approved||Submitted for Approval||In Study||Submitted for Approval|
|Rheumatoid Arthritis (RA)||Approved||Submitted for Approval||In Study||Submitted for Approval|
|Chronic Lymphocytic Leukemia (CLL)||Approved|
|Interchangeable||Non-Hodgkins Lymphoma (NHL)|
|Rheumatoid Arthritis (RA)||Has supporting data||Has supporting data|
|Chronic Lymphocytic Leukemia (CLL)|
|Efficacy||Non-Hodgkins Lymphoma (NHL)||Similar to Rituxan||No Results||Similar to Rituxan|
|Rheumatoid Arthritis (RA)||Similar to Rituxan||No Results||Similar to Rituxan|
|Chronic Lymphocytic Leukemia (CLL)||Not Studied||Not Studied||Not Studied|
|Wegner’s Granulomatosis||Not Studied||Not Studied||Not Studied|
Source: Pharma Intelligence Center
biosimilar requesting additional information. While these actions may delay the FDA approval date, the manufacturer still anticipates approval in 2018.