If your doctor prescribes one of these medicines for you, ask about possible adverse effects including those that affect the heart. Do not change the dosage of a drug or skip a dose of a medication without speaking with your physician initially. Treatments vary from medication to ablation, a minimally intrusive treatment that includes cauterizing the bothersome electric place in the heart. If you can hear your heart and feel it competing, it's most definitely something that should be examined, specifically if you additionally feel faint, lightheaded, shortness of breath and/or upper body rigidity. Have your physician or pharmacist inspect all of your medications and supplements to ensure none cause palpitations. As an example, decongestants that contain pseudoephedrine or phenylephrine can trigger palpitations.