Let's take a minute to talk about your medication.  

This is atenolol, and you should take it as directed.  

Atenolol treats high blood pressure. This is important because it may reduce your risk of having a heart attack or stroke. Atenolol slows your heart rate, so it has other uses, too, like reducing chest pain, and treating patients after a heart attack.  

At first, it can make you tired, so don't do activities that require you to be alert, like driving, until you know how affects you. You could also feel light-headed, and standing slowly after sitting or lying down can reduce this. These are normal and should go away. If these or other side effects become reasons you want to stop taking atenolol, please talk to your doctor or pharmacist. But, don't suddenly stop taking it unless your doctor says it's okay.  

In rare cases, serious side effects could occur, so call your doctor right away if you notice unusual changes to your body, like problems breathing, pain in your legs and chest, or feeling faint.   

If you have diabetes, atenolol can change the way you feel when your blood sugar is low, because your heart rate may not increase as much as before.   

For best results, continue taking atenolol, and follow your doctor's advice for diet, exercise and monitoring your own blood pressure and heart rate.