 But my active psoriatic arthritis can sometimes hold me back. Now with Sky Rizzi to treat my skin and joints, I'm ready to go. Sky Rizzi, Rizin Kizumab Rizza, a prescription only 150 milligram injection for adults, helps with less joint pain, stiffness, swelling, and fatigue. For those who also have plaque psoriasis, 90% clearer skin is possible with just four doses a year after two starter doses. Nothing.