hi, splitimage,

i have a rapid heartbeat, especially in the morning when i wake up. many days it felt as if my heart would pop out of my chest. i am now on a beta blocker. my pressure is normal, usually 120/70, the beta blocker does not seem to have affected it as that's my usual heartrate. recently, i was placed on an anti-depressant, not for depression but because it helps with IBS. apparently, my body no longer produces enough serotonin. anyhow, my point is this, tinkering with medication doses is normal; be concerned but don't be afraid of it. it takes a while to find the right dosage that helps and that your body can tolerate. so, be patient, work closely with your MD and be willing to experiment a little with dosages. yes, i know it's worrisome - i have been there - but it's worth it.