I take 50mg Toprol XL for BP. Started 20mg citalopram 2 months ago for mild anxiety, then reduced to 1/2 that about a month ago. Seem to be tired all the time, and light headed - a little weak. Could that be the mix of the two meds? Or could my blood pressure be up? I m 61, 6 4 tall, 225 lbs. and work out at least one hour, 5 times each week.