This drug probably binds to the funny channel in the heart.
What is Funny channel (If)?
This is a current found in the heart which possess effects which are opposite to those of most other heart currents.
It has a mixed Na+–K+ inward current activated by hyperpolarization which makes it easier for the drug to produce depolarization thereby decreasing heart rate.
Read more about Heart here https://brainly.com/question/26387166
