Is it normal that my heartbeats get faster when I take Dexamethasone? And when I fall asleep, my heart jumps and starts beating faster and I wake up

No . it is not normal. Why are you taking dexamethsone? Is it for allergies or autoimmune disease or what? Whatever the reason for dexamethsone you need to find the cause and also cause for your palpitations and rapid heart. To learn how to treat the cause Please visit us at www.ehacstl.com .