My collegues differ in their approach, much in the same way your advice has been. About waiting for the oral medication, I would not hold my breath. If it works better than you can shift, if not then you wouldn't have wasted time and functional brain. It is your decision and without doing the exam and seeing the MRI it is tough for me to tell you my opinion. I would tend to lean toward treatment.
Any brain function lost is lost forever.
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