#ACR21 Abst#0836. TCZ switch from IV▶️SC in RA ⭐️11/37 ineffective on SC (30%) ⭐️TCZ IV >8mg/kg, no MTX, h/o ABA failure ass w/ risk of flare on SQ switch 🔥Very relevant w shortages, want more data re: confounders (adherence, disease control) https://t.co/E9pD4SrXqz @Rheumnow