Acid Reflux Causes

Over-reactive Immune Response

In some cases, the esophagus appears normal, but GERD symptoms are present. This may indicate an over-reaction of the immune system to irritants that are introduced into the esophagus. In such cases, the immune system reacts with an exaggerated (or hyper-reactive) response, triggering the release of certain factors that end up causing inflammation and possibly injury. (This event is similar to the asthmatic response in the airways.)

Drugs that Increase the Risk for GERD

NSAIDs. Nonsteroidal anti-inflammatory drugs (NSAIDs), common causes of peptic ulcers, may also cause GERD and increase severity in people who already have GERD. In a 3-year study of 25,000 people, NSAID users were twice as likely to have GERD symptoms as non-users. Symptoms did not become evident until after about six months of regular use. There are dozens of NSAIDs including aspirin, ibuprofen (Motrin, Advil, Nuprin), and naproxen (Aleve) and many prescription agents. A person with GERD who takes the occasional aspirin or other NSAID will not necessarily experience adverse effects. This is especially true if there are no risk factors or indications of ulcers. Acetaminophen (Tylenol) is a good alternative for those who want to relieve mild pain.

Other Drugs. Many other drugs can cause GERD, including but not limited to the following: calcium channel blockers (used to treat high blood pressure and angina), anticholinergics (used in drugs that treat urinary tract disorders, allergies, and glaucoma), beta adrenergic agonists (used for asthma and obstructive lung diseases), dopamine (used in Parkinson's disease), bisphosphonates (used to treat osteoporosis), sedatives, antibiotics, potassium, or iron pills.

Other Causes of GERD

Weakened peristaltic movement in the esophagus may contribute to GERD. If the mucous membrane is impaired, even a normal amount of acid can harm the esophagus. Pressure on the abdomen caused by obesity and also wearing tight clothing can contribute to acid backing up into the esophagus.

Click the icon to see an image of peristalsis.