Our expert says:
I think you need to consider seeing a doctor, more about the whole body cramps than the muscle pain. I suspect that the muscle pain is simply muscle fatigue and "wear and tear" caused by the running you've been doing. It's not that uncommon, and all that you need to do is reduce your training by 30% - cut back on how much you're running because it's probably just a little more than your body is capable of.
For the cramps, that's a different story, and while the pharmacist has prescribed something, it's clearly not the solution and you need consider seeing a doctor to establish the cause. There are maybe a dozen conditions that can cause cramps, and I would be guessing at the reason.
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