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Caffeine-Related Health Problems. Caffeine increases your heart rate, elevates your blood pressure, and can contribute to the development of heart disease. Both decaf and regular coffee increase your cholesterol and homocysteine, the biochemicals that science has linked to increased risk for heart attack.
Yet panic attacks and anxiety themselves do not account for all of the palpitations. 1  That's because palpitations may also occur for reasons unrelated to anxiety, but still affected by anxiety. For example: 2  Caffeine Caffeine is known to cause heart palpitations. It's likely that those with anxiety are either more prone to these palpitations, or more prone to noticing them and thus amplifying their effects. Alcohol and Nicotine Both alcohol and nicotine may also cause heart palpitations.