This medication is an antihistamine that treats symptoms such as itching, runny nose, watery eyes, and sneezing from  hay fever  and other allergies. It is also used to relieve itching from hives. Loratadine does not prevent hives or prevent/treat a serious allergic reaction (e.g., anaphylaxis).
In between the parietal and visceral pericardial layers there is a potential space called the pericardial cavity, which contains a supply of lubricating serous fluid known as the pericardial fluid. When the visceral layer comes into contact with heart (not the great vessels) it is known as the epicardium.
The pleura is the serous membrane that surrounds the lungs in the pleural cavity; the pericardium is the serous membrane that surrounds the heart in the pericardial cavity. The peritoneum is the serous membrane that surrounds several organs in the abdominopelvic cavity.