Rheumatoid Arthritis Support Group
Rheumatoid arthritis is a chronic, inflammatory, multisystem, autoimmune disorder. It is a disabling and painful condition which can lead to substantial loss of mobility due to pain and joint destruction. The disease is also systemic in that it often also affects many extra-articular tissues throughout the body including the skin, blood vessels, heart, lungs, and...

I think if you are serious about staying on mthx, you do need to stop totally drinking. Like I said, I know so many people on mthx, who had even one drink for Christmas or a special occasion and the liver enzymes went up.
The increase is the issue. You won't be really bad with the liver, till it hits over 1000 for the key markers. BUT, that being said, once the enzymes start to go up, they will continue to go up, if you don't address what is causing the problem, which is obviously the mthx, but perhaps the drinking, in combination.
That is just my opinion. I also have a strong opinion that people who will not stop drinking, even socially, for obvious medical problems may have a problem with drinking. I personally think you need to totally stop drinking if you are going to stay on mthx. You can always add it back later, and if you get the same results, you will know.
Including the bloodwork you had prior to startingTX, how many blood draw appointments did you have?
Half-Life - The terminal half-life reported for injectable methotrexate is approximately three to ten hours for patients receiving treatment for psoriasis, or rheumatoid arthritis or low dose antineoplastic therapy (less than 30 mg/m2).
Excretion - Renal excretion is the primary route of elimination and is dependent upon dosage and route of administration. With IV administration, 80% to 90% of the administered dose is excreted unchanged in the urine within 24 hours. There is limited biliary excretion amounting to 10% or less of the administered dose. Enterohepatic recirculation of methotrexate has been proposed.
[A lot of the literature about injectable MTX is for the IV version of MTX used for cancer patients, which is in much higher doses.]
Also, were you on antibiotics prior to starting MTX? Which one? How long before starting MTX?