I tried twice stopping my low dose (12.5mg) metoprolol with poor results. The first time I stopped abruptly and after 3 days I had a 12hr Afib experience which really scared me. I restarted the 12.5 mg metoprolol and returned to a low heart rate/low BP condition. About a month later I tried again to stop, this time tapering off by skipping every other day, and then skipping 2 days. I noticed my heart rate started to become irregular which concerned me to the point of restarting the regular dose of 12.5 mg per day with my heart rate returning to a regular rhythm. A cardiologist I saw about 6 months ago suggested that I continue with metoprolol and increase my dosage to 25 mg per day. I am not happy with the effects of low heart rate and the corresponding lack of energy and getting easily winded in return for a regular heartbeat. Note, my regular cardiologist approved of me attempting to stop the metoprolol but did not advise me how to do it or what reaction I could expect.