Colin is right. Increased heart rate upon waking can be a symptom of low adrenal function -- i.e., the adrenal glands aren't producing enough cortisol. Before people start taking remedies to reduce what they think might be symptoms of "high cortisol" it's usually a good idea to get some adrenal gland function testing done. The best test for doing this is the saliva testing.

Trying to lower cortisol when, in fact, a person has adrenal glands that are insufficient and not producing enough cortisol can be a recipe for disaster. IN other words, some people incorrectly assume that their symptoms are those of high cortisol (or overproduction of cortisol), when what they really have is not enough cortisol.