[quote:c722acb9e2]Do you people feel such heartbeat too. Does it decrease with time when you get more familiar with DMT. I don't have much experience and this is the main reason. My heart beats so hard that it affects my breathing and is just very uncomfortable.[/quote:c722acb9e2]    My friend said me that he is more concerned by breathing than heartbeats. Last time he had a strong breakthrough (yaaaa... tooooo much  :shock: !) he was quite upset by the fact he lost body and breathing feeling so he 'forced' himself to consciously breath (if that makes any sense in that state), having only a sort of feedback from hearing the breath. It's quite unconfortable and I guess just relaxing and letting go would have do the trick.    Same for the heartbeat I would say. I guess that the increased rate comes from the intensity of the experience and not from a chemical action of the DMT on the heart. So yes, repeated experiences will help. But any relaxing substance may help also.