I don't have any concerns about Atenolol but wonder about how it affects the drops I use in combination to control eye pressure for Glaucome Suspect which I have had for the last 20 years. I take the Atenolol at the same time in the morning that I take two of the drops-- Brimonidine and Timolol Maleate--and sometimes feel a little lightheaded. The Opthomolist is aware of this but does not seem to know why this happens.