A patient receives bethanechol after abdominal surgery. Her heart rate falls slightly and she experiences some wheezing. These cardiac and pulmonary response represent or reflect? (LQ)
|A||Expected side effects|
|C||Parasympathetic ganglionic activation|
a. These are expected side effects from Bethanechol, which is a muscarinic agonist (parasympathomimetic drug).
b. These effects are common, not at all an idiosyncratic reaction. Bethanechol has no sympathetic (or parasympathetic. ganglionic blocking actions.
c. If the patient had undiagnosed asthma (and the presence of asthma would contraindicate the use of the drug), the pulmonary response would be much more significant than “some wheezing.”
d. Potentially fatal bronchospasm could occur, because the airway smooth muscles of asthmatic individuals are exquisitely hypersensitive to muscarinic agonists, with even small doses of those drugs capable of causing a lethal outcome.