Hello,
Norma heartbeat ranges from 60-100 bpm. Your heartbeat is low because of side effect of medication (Terazosin-it is an alpha-blocker, which lowers BP & may cause slow heartbeat), poor electrolyte balance(take ORS, soups & juice),
obstructive sleep apnea, poor general health, thyroid issues(
hypothyroidism).
You are suggested to get physically examined, get your general health condition better. Get treated if you are diagnosed with obstructive sleep apnea or thyroid issues. Get treated at the earliest.
Quit
smoking &
drug abuse. You can talk to your treating doctor & get Terazosin replaced by other medicines that will suit you better.
Your treating doctor can suggest you surgery(TUIP/TUNA) depending on the moderate or severe symptoms you may have.
Bradycardia should not continue after appropriate treatment but if it does your treating doctor will suggest Pacemaker for you.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Nupur K, General & Family Physician