I have been on Methotrexate for about 18 months now for Psoriatic arthritis. It is one of the common drugs for the treatment of auto-immune inflammatory arthritis. The side-effects would have (or bloody well should have !!) been explained to you by your rheumatologist. There is also this link:
http://www.rheumatology.org.au/commu.../MTX210208.pdf
I have experienced no noticeable side effects, but then, in my case, the drug had very few clinical effects either. It probably reduced the pain in my joints by about 5-10%, but many others find it very effective. Everybody reacts differently to these medications, and the process of treatment of auto-immune arthritis is a trial and error process. They certainly won't let you stay on it if there are any persistent side-effects, or adverse blood test results.
Quite apart from side effects, one thing you HAVE to watch is excessive alcohol consumption (bugger!!). If you don't, your liver can be damaged, and in any case, blood tests have to be undergone on a regular basis to check various parameters when you are on these drugs.
In my case, after only limited help from the standard drugs (Sulphasalazine, Methotrexate, Mobic), I qualified for one of the injectable "biologics", and I am now on Enbrel (etanercept), which has completely removed the inflammation. It is a long process getting qualification for these injectable drugs as they are very expensive for the PBS, and I am still on the methotrexate, as it helps prevent antibody build up with the Enbrel. Hangovers, therefore, are a thing of the past .:D
Cheers,
Lionel

