Ibuprofen's leaflet mentions a contraindication when taking medication for T2 which you're *not* on: "sulphonylureas (to treat type 2 diabetes) since the blood sugar levels can be affected", so that might indicate something could be going on. For me, NSAIDs like diclofenac and naproxen have caused relatively low dips and the odd hypo over the years, while on diet-only. So that's purely anecdotal and potentially useless, but still. Thought I'd mention it.