My cardiologist has me on 25 mg of atenolol every night i wake up coughing and have wheezing in my chest. is this some side effects of it. i also have?

Atenolol: Atenolol usually wouldn't cause what you describe, generally you'd have the symptoms all day and more in the first few hours after taking the drug. There are other causes for nocturnal cough/wheezing, you should discuss with your doctor.

Betablockers: In susceptible patients, betablockers such as atenolol could cause bronchospasm, i.e. Spasm of the airways, somewhat similar to asthma, causing shortness of breath and perhaps cough.