Hello thanks for asking from HCM for your health related queries I can understand your concern. Xanax is a benzodiazepine drug that can help in controlling anxiety and its symptoms but it has not much use in essential tremors. Vyvanse is amphetamine drug and the drug causes excitation and in some individuals it is known to worsen the tremors. The drug can be used for hyperactivity disorders provided you have been diagnosed with it. As your symptoms are persisting so I would also advise you to consult a psychiatrist. Medicines like Beta Blockers especially Propranolol can be used for control of tremors and this drug will also help in controlling anxiety. Visit a psychiatrist for evaluation and treatment. Avoid excess tea, coffee, activating drinks as these drinks worsen the tremors. Thanks, Hope this helps you. Take care