Hi liltle sister. Here's a link to the side effects of mtx: http://www.webmd.com/drugs/2/drug-3441/methotrexate-anti-rheumatic-oral/details#side-effects
Folic acid is given to combat hair loss - another side effect of mtx. While many docs also prescribe folic acid along with mtx, you can also buy it OTC. That shouldn't be causing your elevated potassium. I'm guessing that you take 1 mg/day of folic acid. You get about 40% of that amount in your normal diet - especially if you eat alot of green vegetables. A boost of 1 mg of folic acid shouldn't cause problems. However, since you don't see MD after my name, please call your doctor and discuss.
Pete
dx 1/11
"Every day is a good day. Some are better than others." - unknown
"Take your meds as directed and live your life as fully as you can." - Michael Chacey, MD
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