“In comparison, betaxolol (10−6 M) produced a smaller blockade of the epinephrine effects; a rapid recovery from the betaxolol effects was observed, with a greater than half-maximal response to epinephrine observed 15 minutes after removal of this beta blocker.”
“These findings may help to explain the clinical observations of an outflow facility effect of epinephrine when used in combination protocols with betaxolol , but not with timolol.”