I have been diagnosed with an under active thyroid. I have been on medication for years. Over the last year or so my BP Has been steadily on the rise. Leading to my dr. Putting me on atenolol. She also stated that I had been taking my thyroid meds incorrectly, ie. With other meds, and inconsistently. I have changed the way I take my thyroid meds (levothyroxine .75mcg) to consistently around 10am. I also take my atenolol at 6am, due to having some side affects. I have noticed lately that i have been having heart palps (more so in the evening) and increased anxiety. One of the things my dr had mentioned was that my thyroid could now be over active. But according to her, the blood tests were within normal limits. When I took the blood tests I had not taken my thyroid meds for two days, which I informed her of.