title: Ask the doctors.  I have had atrial fibrillation for a year, and I have felt pretty normal on a beta blocker (metoprolol) and digoxin.  However, I recently began to feel very fatigued and noticed my heart rate was only 35 beats per minute.  We stopped those medications, and my heart rate came up.  I feel better.  Are these drugs dangerous for me?
authors.forename: Thomas
authors.initials: T
authors.lastname: Lee
authors.forename: Richard
authors.initials: R
authors.lastname: Lee
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage / Q000009:adverse effects*; D001281:Atrial Fibrillation / Q000188:drug therapy; D004077:Digoxin / Q000008:administration & dosage / Q000009:adverse effects*; D004305:Dose-Response Relationship, Drug; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D008790:Metoprolol / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D000319:Adrenergic beta-Antagonists; D004077:Digoxin; D008790:Metoprolol