I had my hair permed a couple of times when I was on Methotrexate...

First time I just had a body perm which wasn't a tight perm, just enough to give a bit of curl and body. I had no problems with this...

When I came to my second perm, I wanted a much tighter perm which meant more perm solution.. I found with mine that it dried my hair quite a bit but was soon sorted with some conditioning treatments. With Methotrexate I'd lose a small handful of hair but nothing that would have a huge impact, plus I have a thick head of hair...

Hairdressers these days are much more informed on drug treatments and I think if you were to explain what you were on (after all it is a form of chemo) then the hairdresser can look at treatments that will keep hair in good condition...

I found L'oreal Kerastase mask treatment wonderful for my hair but I'm sure there are lots of other products around...

Hope that helps xx