If left untreated, it can cause irreversible damage to the brain, spinal cord, heart, and other organs
However, due to the drugs immune suppressing effects, those taking Tocilizumab are at an increased risk for serious health conditions, including infections that may lead to hospitalization or death (MD Consult 2012)
10.1523/JNEUROSCI.6569-10.2011 J
Lancet 360 (9343), 13471360
Although dementia includes memory loss, you also have other problems with thinking that lead to a decline in daily functioning such as language problems, lapses in judgment, and vision problems
Garver DL, Bissette G, Yao JK, Nemeroff CB (1991) Relation of CSF neurotensin concentrations to symptoms and drug response of psychotic patients