Hi CMe4a4b9, and welcome! I see you joined our online community earlier today in the afternoon, and we're glad to see you are already participating here with the rest of us!
You may be aware we cannot provide medical advice or diagnostics over the internet (for your own safety), but your concern certainly warrants a reply
The diagnosis, treatment and prescription of medication for heart palpitations and cardiac arrhythmias for any patient is within the purview of one's own private medical doctor (PMD).
Have you been diagnosed with a heart palpitation or cardiac arrhythmia? Are you under the care of a physician at this time?
Please do let us hear back from you as we have a genuine concern for your good health.
Wishing you well,
Leon (site moderator asthma.net)