My son has been on propananol for 14 yrs. And his dr. found his heart rate 30 and b/p was extremely low. Sent him to cardiologist and he took him off med. took his last pill Sunday.Now went to Dr today has bronchitis,and upper respiratory infection.,he gave him penicillin, rocepherin shot and steroid med he says he is feeling flushed and heart is beating 108 .Could it be some of the meds causing flushing feeling?