Hi,
This tablet is very effective in reducing the pain,although causes sleepiness and if it causes excessive sleepiness then you can get the tablet changed.
You should get an mri done to evaluate the cause behind the problem and there are many similar problems which cause similar symptoms.
Serum electrolyte is a blood test and can be taken from any lab,although the values should be fine its just confirmatory.
You can also try flexon-mr half tablet twice daily along with tab rantac one tablet tw ...
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