Is atenolol is safe to take for long time to treat hypertension? i m taking this from last 1 year

Yes, it is: Although the preferred method to control hypertension in a young patient like you would be diet, exercise and lifestyle changes, if they are not enough, medications are indicated. They will help you decrease the chances of high blood pressure-induced damage to your organs. Atenolol is generally safe, affordable and well tolerated

Yes: Although I wouldn't view a beta blocker as a first line treatment for hypertension, especially in a young person like yourself. Make sure you've addressed all lifestyle changes (diet, exercise) before requiring potentially lifelong medical therapy.