When a patient presents with symptoms suggestive of statin<unk>  myopathy, the diagnostic evaluation should include measuring the level of creatine kinase. It is useful to obtain the levels of TSH, ESR and vitamin D levels as well in order to rule out other diseases that can cause myalgia.
Statin induced myopathy laboratory tests
Statin induced myopathy screening
Peripheral neuropathy MRI
Cardiac amyloidosis electrocardiogram
Peripheral neuropathy echocardiography and ultrasound
Myasthenia gravis MRI
Dermatomyositis MRI
Polymyositis and dermatomyositis physical examination