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is known to cause muscle damage and pain. It is best she reports to her Doctor who has prescribed this and request alternate treatment. It would be wise to also get an ECG done as heart problems can also have similar picture. She needs to drink enough water. She can take over the counter pain killers like Paracetamol
after consulting with a doctor for pain relief. Kind;y report to her Doctor about this problem and get the issue sorted by either dose reduction or drug change which would be done in most cases.