Had Transient Ischemic Attack. On Beta Blocker. Not Getting Cure. CT Scan, MRI Normal. Prognosis?
If the doctor suspects about essential tremor (its hallmark is if the patient's tremor gets better with drinking alcohol), then a better medication (apart from Beta blocker that you mentioned) would be any thing from the class of benzodiazepines (and since he is more than 65, a medication which is not metabolized by the liver like oxazepam or lorazepam) would be the choice.
It is better to ask doctor to take full history, and physical exam to see what is the real cause. Let me know if you have any question. I wish him a good health.
Lorazepam or oxazepam will decrease the essential tremor. Family history is usually positive in this case.
By the way it is not ethical to access to his file and the doctor will not do other than he gives verbal consent to.