Sorry something happened when writing this and instead of continuing as an answer to a post it has become a post.
Atropine derived from Belladonna can be used for Bradycardia - very low heart rate, and also to stop respiratory secretions before surgery, and urinary frequency but only under medical supervision apparently and can be used as an antidote to some illegal drugs - you learn something new every day. Sorry can’t paste link to the website I found this on.
Exercise and heart rate
Loneliness and depression
Ablation date
Update
Fits of rage...
