I'm on it, my platelets and while blood cells have been steadily decreasing while I've been on it.
I wouldn't say it's a drug to be taken lightly at all, depending on dose and such I suppose.
I'd look closely into the effect on the immune system and liver, but, as I said it depends on dose etc...
Also the effect on CRP and possibly making it more difficult to spot some signs of infections - CRP is an inflammatory marker so can be raised in infection (I remember mine was high when my gallbladder got infected) but it is flattened by tocilizumab, I don't get a reading on it. I have to carry a car saying I'm on it.
It can also make you much more prone to infection, I've had a few on it and it can make them worse. Worth considering if you are around people with lots of germs (small children at nursery maybe, especially chickenpox//shingles virus) or sources of infection.
Slaney may be able to help more.