Fillers before or after a facelift can be okay, just make sure you notify your plastic surgeon of this before the surgery.
Thank you for the question and sharing your photo and concerns. I would discuss elective surgery with the physician prescribing the Rituxin, as to when it would be safest for you. I would consider evaluation by a facial plastic surgeon or other cosmetic surgery specialist to discuss your options."This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."