EWING, N.J.--(BUSINESS WIRE)--Antares Pharma, Inc. (NASDAQ: ATRS) today announced positive results from an Actual Human Use (AHU) study for VIBEX Methotrexate (MTX). The clinical trial was conducted as a multi-center, open-label, single-arm, in-clinic study to evaluate the actual human use of methotrexate administered via the VIBEX Medi-Jet in adult patients with rheumatoid arthritis (RA).