2 days ago my husband was put on Atenolol for high blood pressure & all of a sudden his personality has changed. He is very aggitated & sensitive & bothered. He doesn't feel good at all & can't get comfortable. Is 50mg too much at once? He was given Atenolol a couple of years ago but the doctor had him take 25mg in the morning & 25mg at night. This doctor the other day has him take 50mg 1 time a day. Could that be too much for him?