Final answer:
An adverse reaction to propranolol would be indicated by increased salivation.
Step-by-step explanation:
In this case, an adverse reaction to the medication propranolol would be indicated by a report of increased salivation.
Propranolol is a type of medication known as a beta blocker, which works by blocking beta-1 receptors in the heart. This leads to a decrease in heart rate and blood pressure.
While side effects of propranolol can include night cough, tinnitus, and excessive tearing, those symptoms are not necessarily indicative of an adverse reaction. However, increased salivation can be a sign of a serious adverse reaction, such as an anaphylactic response or an overstimulation of the parasympathetic nervous system.