I was previously taking 25 mg in the am and 12.5 mg in the evening of the generic Toprol XL
. Now I am taking 25 mg in the morning of generic Lopressor, and another 25 in the evening, but less than a full 12 hours apart. For example I will take the 25mg at 7 am, another 12.5 at 2pm and another 12.5 at around 6 or so.I have had breakthrough tachycardia, mostly when I wake up in the morning or a few hours after. Could this be caused by the change in medication?