Welcome to HCM!
I understand your query. However, I assure you that there is no need to worry. MRI
is a harmless and painless scan which will help your doctor in diagnosing your back problem.
The medicines that were prescribed to you are for treating your pain and acidity (which occurs due to painkillers) .
Kalonapin is Clonazepam
which is commonly used to treat anxiety
These drugs will not cause any harm to you or during the MRI.
Hope this information helps. Feel free to ask if you have any doubt.
Wishing you the best.
With warm regards,
Dr. Sridhar Reddy