I have been taking lisinopril for 10 years but recently pressure became too elevated and dosage was increased. Pressure in the mornings became too low but evening readings still too high. I started having sever disiness/weakness in the mid mornings so quit the medication completely. B P stabilized some was still too high so Dr. reinstated lisinopril. Dizzyness increased mid mornings so I stopped the med which eliminates the mid morning episodes but BP is still out of bounds. What can I do? I have A-fib with low heart rate and frequent missed beats.