I have notices that when he takes the adderall, there is no real increase in heart rate, maybe 80 bpm. But then as adderall begins to wear off heart rate shoots to 100 bpm. SWIM also noticed that there was a quick shooting pain in heart. SWIM noticed that after eating something and drinking orange juice (citric acid?) that these problems stopped. Could SWIM be having these feelings because he hasn't eaten in 24 hrs. most times he takes adderall, or something else? Also, I have a beta blocker, is this a safe alternative? Any other ways for SWIM to lower heart rate?