Are you swallowing it whole? Its not listed as a side effect. It sounds like a viral thing.
Yes it certainly can! I have used ibuprofen for years for occasional pain with no issues. Over the past week I had to take two or three extra strength in a short period of time... approximately every 12 yours. All of sudden I developed what felt like a canker sore or at least that what it feels like in the corner of my moth. I have never had such a sore ever nor have I ever had a cold sore. I was baffled as to the cause. Someone asked if I have taken ibuprofen recently and I was dumbfounded. So I can't imagine what else it is doing in my body besides numbing pain. Never again. I shall use it sparingly.
- Ibuprofen Information for Consumers
- Ibuprofen Information for Healthcare Professionals (includes dosage details)
- Side Effects of Ibuprofen (detailed)
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