<unk>  is a pyrimidine synthesis inhibitor that is FDA approved for the {{{indicationType}}} of rheumatoid arthritis. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include alopecia, rash, diarrhea, ulcer of mouth, dizziness, headache, respiratory tract infection.
Leflunomide
Tofacitinib
Etanercept
Teriflunomide
Belatacept
Belimumab
Adalimumab
Efalizumab