You often can reduce or prevent changes in your heart rate or rhythm.

• Prevent fatigue by getting plenty of sleep and rest. If you become overtired, your changes in heart rate or rhythm may be more severe or occur more often.
• Cut back or eliminate caffeine, including coffee, tea, colas, and chocolate. Some nonprescription medicines, such as Excedrin, contain caffeine. Caffeine increases your heart rate and can cause irregular rhythms.
• Cut back or eliminate alcohol and tobacco, which also contain substances that increase heart rate and can cause irregular rhythms.
• Stop using medicines that increase heart rate, such as cough and cold remedies, nose drops, or allergy relief medicines that contain pseudoephedrine, epinephrine, or ephedrine.
• If stress affects your heart rhythm or rate, try relaxation exercises and deep breathing techniques. A healthy exercise program can help reduce stress. For more information, see the topic Stress Management.