Just an opinion, recently informed my md cardiologist had side effects from taking toprolxl 25 mg tab once daily only 1/2 dose 12.5 mg then after on med for 3 yr wondered why on do long but taking w side effects lightheadedness memory appearing different having dry mouth legs some edema and not feeling right. after testing and visit deceided and weined me off w tappering dose NOW, SINCE VISIT STATING INTERVAL OF SOME FAST BEETS. decides to take as needed metroprol succinate 25 mg 1/2 tab only as needed ... since drugs similiar on long acting /other short Would u take this! knowing signs symptoms similiar my heart rate is 60s and I do get APC S the side effects are not worth the risk again! as a nurse YYYY@YYYY I feel I would get second opinion from some one else I am aware I am drug sensitive do not like to take meds only if indicated. take fish oils coq10,mvi, asa 81 mg daily since age 40 since cardiac hx in family parents I am non-DM .....