My 86 Year Old Mother Is Suffering From Daily Debilitating

My 86 year old mother is suffering from daily debilitating migraine headaches. She had a MRI which was negative but was told to go to see a neurologist. I asked her doctor if it could be from amlodipine and would she consider changing her blood pressure medication. She said it absolutely was not from the medication. She also takes Inderal, I am suspecting a drug interaction and side effects.