system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 78-year-old female presents to her primary care provider complaining of shaking of her hands. She reports that her hands shake when she is pouring her coffee in the morning and when she is buttoning her shirt. She has noticed that her tremor improves with the several beers she has every night with dinner. She has a past medical history of hypertension, atrial fibrillation, moderate persistent asthma, acute intermittent porphyria, and urinary retention. Her home medications include hydrochlorothiazide, warfarin, bethanechol, low-dose inhaled fluticasone, and an albuterol inhaler as needed. On physical exam, she has an irregularly irregular heart rhythm without S3/S4. She has mild wheezing on pulmonary exam. She has no tremor when her hands are in her lap. A low-amplitude tremor is present during finger-to-nose testing. Her neurological exam is otherwise unremarkable.

Which of the following is a contraindication to the first-line treatment of this condition?
assistant
Asthma