Is there any harm in drinking two cups of coffee in an hour?

well why don't you check it out

Is it bad to drink 2 cups of coffee a day?

Explanation:

Drinking coffee each morning does have several health benefits, but too much can raise your risk of cardiovascular disease. A cup of coffee may be just what you need to get going in the morning. A second cup is to get out the door, and a third (OK, even a fourth) is likely if you're especially tired.