This summer has been brutal, but my heat tolerance has really changed this year. I'm thinking it is one of the meds I am taking. I was outside ten or fifteen minutes tonight. My husband and I were putting a shade tarp over our little garden. The sweat was pouring off of me, in my eyes, and it was literally dripping from my hair. I looked as though I had just gotten out of the shower. I started to feel sick, so I came in and peeled my clothes off. Ugh. Think MTX could cause this increase in heat intolerance and sweating?