Muscle pains and diet drinks

[Targarama]

I typically drink 1x Coke Zero at lunch and occasionally a diet coke in a pub in the evening. I recently started getting weird muscle pains in my knees, arms and hands (sometimes where I'd strained myself a bit, sometimes not). Definitely not joint pain, Ibuprofen seemed to sort it quickly. Strange though. Lasted a day or so then vanished.

Then someone suggested diet drinks and aspartame being a possible cause. So I stopped drinking diet coke since Saturday. The pains have gone completely. It is possibly too early to be sure but it seems aspartame was the cause. Has anyone else experienced similar?

Note: I've now taken to drinking a beer instead during the evenings ... oops. I don't drink tea/coffee so have a choice of fruit juice or water. Or beer/Wine