According to the drug database interactions software I use, there are no interactions between the Amoxil and the other drugs listed. The only concern is nausea with some patients if they do not eat when taking the drug, so you might want to eat a light snack before you take it, especially if you are going to take these other drugs with it.
Hope this helps!
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Joint pain should not be associated with the Amoxil or the mixing it with these other drugs. However, a couple of the other drugs you have listed do carry a side effects of muscle and joint pain, so it could be one of the other drugs itself.