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There will be nothing over-the-counter that can be used safely or effectively for long-term oral pain control.
I would not recommend drugs like aleve, aspirin, ibuprofen, or tylenol for this purpose.
So, you will need to ask your vet for a oral pain medication like Gabapentin or Tramadol to help.
Also, if not hypersalivating, eating normally, and not chewing awkwardly, you could be very conservative in pain medication given, as those are some typical signs to suggest tooth discomfort.