#37.5mg Tramadol (Ultracet) seems to be the most effective OTC painkiller for my arthritic knees.
For about a month, I've been taking 1 tablet per day, around noon, before I go out. It is far more effective than any of the NSAIDs (paracetamol, enteric aspirin, ibuprofin) I've used.
Is that low a dose still potentially addictive or capable of causing undesirable side-effects?
Will the effectiveness of that dose likely diminish over time, requiring a larger dose for the same effect?