My son (24) has been on Methotrexate for about 6 weeks.(20 mg) At first there were not many symptoms but a few weeks ago he started feeling nauseated the moring after, and it seems to be getting worse week after week. Is there anything he can take to help with this. I was wondering if gravol might help? He has really cut down on the naproxen since he start the MT, but I wonder if that is the thing to do if he still has significant pain? How long does it take this stuff to work?