<unk>  is a pyrimidine synthesis inhibitor that is FDA approved for the treatment of patients with relapsing forms of multiple sclerosis. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include headache, diarrhea, nausea, alopecia, increase in ALT.
Teriflunomide
Tofacitinib
Etanercept
Leflunomide
Belatacept
Belimumab
Adalimumab
Abatacept