Gastroesophageal Reflux Disease
Let’s discuss GERD. So the way food normally travels is into the mouth, down the esophagus, through the lower esophageal sphincter and then into the stomach. From there is passes into a bunch of other organs and such, but we’re focusing on just this upper region for now.
So the actual disease of GERD is a chronic reflux of gastric contents into the esophagus, which is to say that the food you ate, which is now mixed up with a bunch of acids, is going back up into the wrong pipe, instead of down.
The main causes of it include an incompetent lower esophageal sphincter, so that lower band of muscle which normally closes up after you swallow food, doesn’t properly close. It would be the equivalent or your anal sphincter not properly closing and you just have shit leaking out of you. Not pleasant. A hiatal hernia is also a common reason, which is when your body makes a little pocket above the sphincter where stomach contents then collect, also not fun. Next up is decreased esophageal clearance. So normally when your sphincter is open some stomach acid can accidentally splash inside the esophagus, but it’s no big deal since your esophagus pushes everything down, and any leftover acid is neutralized by your mouth saliva, but in this case your esophagus isn’t able to push food fully into your stomach and so it sits there in the bottom of your stomach, getting acid splashed on it and becoming way too acid. Similar to this is decreased gastric emptying which is when your stomach itself doesn’t push food into the small intestines, causing it to get backed up and therefore backing up into the esophagus. This is commonly associated with gastroparesis caused by diabetes. The nerves are killed off by the chronic inflammation and high sugar content of diabetes and are no longer able to tell the muscles to contract. These are the main causes of GERD.
Cool, now that we know what causes it, let’s talk about the signs and clinical manifestations. First and foremost is pyrosis and dyspepsia. Pyrosis is the medical term for heartburn, from the Greek word for fire, ohh I might do a word of the day for this one. Dyspepsia is the word for indigestion, the feeling of bloating or fullness, stomach uncomfortability. Along with that we have hoarseness, a sore throat, a choking feeling. You can suffer from wheezing, coughing, or dypnea (shortness of breath). You can also feel a chest pain (also known as angina) which some people think is a heart attack, understandably so.
Complications and issues that occur because of GERD: First is esophagitis, which is an inflammation of your esophagus. As a side note, the ending -itis, means inflammation of, so if you ever see that on a word just know that the body part is inflamed. Now chronic GERD and esophagitis can lead to Barrett’s esophagus, which is when the normal lining of the esophagus turns into tissue that resembles the lining of the intestines, which, first off, ew, but more importantly, is a major precursor to esophageal cancer, which it also not pleasant. The last major complication is the risk for aspiration, wherein you get that acid or food into your lungs, which is terrible for a myriad of other reasons.
Diagnostic studies done to determine the cause or to fully diagnose it include an EGD with a biopsy (biopsy to check the tissues to see if the pt has Barrett’s esophagus) and a Barium Swallow Test.
Best ways to prevent or stop GERD is to stop smoking, avoid alcohol, lose some weight, elevate the head of your bed 4-6 inches/sleep on more pillows, avoid additional physical stressors, and nutritional changes, notably avoiding foods that you know cause food (spicy foods lol), avoiding milk and consuming small frequent meals. Avoid eating 2-3 hours before bedtime and avoid nocturnal snacking as everything moves a bit slower when you’re asleep and laying down.
Now onto the drug therapy portion! The most common and arguably most over-prescribed medication right now (more than any opioid) are PPI’s, Proton Pump Inhibitors. General run down of them: they work by inhibiting the proton pumps that are responsible for Hydrogen secretion in the stomach, the H+ is whats responsible for making your stomach acidic, so this prevents muscle acidity. These are the medications that end in “prazole”, think Pantoprazole, aka Protonix. They’re best taken before the first meal of the day and are taken once a day. It takes a while for them to kick in and can cause headaches, diarrhea, and constipation. There’s an increased risk of fractures, and patients can develop C.diff since the stomach is no longer acidic enough to keep it at bay.
Next up we have H2 receptor blockers. They work by blocking the action of histamine on H2 receptors which then decreases HCL production and secretion. They’re also taken an hour before or after a meal. With these you want to be wary of drug toxicity with other drugs like coumadin.
Antacids are a cheap over the counter medication that are effective but are very short lived. Examples of this include Magnesium Hydroxide (which can cause diarrhea), Calcium Carbonate/Calcium Citrate (which can cause constipation), and others. Most of the can affect the absorption of other drugs, namely tetracyclines and quinolones, both of which are antibiotics.
The last major group of drugs are cytoprotective drugs. While most other drugs work by decreasing something in the body, HCL, Hydrogen, etc, these drugs work by stimulating the lining of the stomach to produce more mucous which then covers and protects things ulcers that have formed. The two main ones are Cytotec and Carafate. Cytotec works by decreasing the HCL secretions (on top of the increasing mucous) and is administered with meals. It can cause diarrhea, flatulence, and miscarriages. In fact that drug is also known as misoprostol and is used in Maternity for abortions. Carafate is a cytoprotective drug that is to be taken ACHS (before meals and at night time), and 30 minutes before antacids. It binds to digoxin and other medications so it will decrease their effectiveness. This one works by binding to the mucous and forming a paste like substance.
That’s all I got for now lol.