Please taper your Tylenol as well. I am allergic to aspirin and all NSAIDs (Non-Steroidal Anti-Inflammatory drugs) and used 3000mg Tylenol as my OTC pain management for several early years of my PMR journey. I am now sensitive to Tylenol and will get hives at 3000mg, yes hives, when I take that much for several days in a row. I can now only tolerate about 1000mg per day. My allergist says it is real and very rare, it happens, albeit rare. Now I take warm showers and a glass of wine some evenings.