Has sensodyne pronamel ever been known to cause heart palpaltations and a hard heart beat? the potassium nitrate in it?

Potassium nitrate: Hopefully you're not swallowing large quantities of this toothpaste or mouthwash? Most likely you would get a very upset stomach first, before effects on your heartbeat. But you don't want to swallow anything with inorganic Fluoride in it either. http://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@term+@docno+1227.

Haven't heard of: It. The potassium nitrate etc is in trace amounts. The paste is not made to be ingested in large amounts rather a pea sized amount dispensed on the brush for brushing and then expectorating. But for safety sakes if you feel that it is causing problems switch the toothpaste. There are many other good desensitizing pastes available. Hope this helps.