Atenolol and thyroid condition

I have been on Atenolol for about 7 years now - 25mg. At first I found it made me feel tired and slowed me down too much, however, I decided to cut it in 1/2 and take 1/2 in the am and 1/2 in the pm and this seems to work much better.

In fact, when I told my doctor, he said it was a better idea since instead of getting a larger dose all at once, and having it wear off later in the day, the dosage would be more constant in my blood stream all day.

Thankfully, I really can't say I have any negative side affects from it and I do not take any drug I really don't need because I do not tolerate medications very well. The only other medication I take is Synthroid because 9 years ago I had radioactive iodine for my thyroid condition.