I Just Started It With Orencia For Lupus And RA.

I just started it with Orencia for lupus and RA. My cousin who also has lupus it's a different medication but she said that she used to take Orencia and that it is a low-dose chemo therapy medication but it is mostly used for autoimmune diseases. So my question is is that I chemotherapy drug and what do I need to know about it I'm having a hard time finding anything new about the medication