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Gastroparesis

Gastroparesis is delayed stomach emptying without a blockage, causing nausea, early fullness, and vomiting; diabetes is the most common known cause, and diet changes are first-line treatment.

Gastrointestinal
Gastroparesis means "stomach paralysis" — a condition in which the stomach empties food into the small intestine much more slowly than normal, even though nothing is physically blocking the way. It usually results from damage to the nerves or muscles that coordinate stomach contractions, particularly the vagus nerve. Gastroparesis can significantly affect nutrition, comfort, and blood sugar control, but a combination of dietary changes and medication helps most people manage it well. Causes:
  • Diabetes: The most common known cause. Years of elevated blood sugar in diabetes can injure the vagus nerve, the same process that causes diabetic neuropathy in the feet and hands.
  • Surgery: Operations on the stomach or esophagus can injure the vagus nerve.
  • Medications: Opioid pain relievers, some antidepressants and anticholinergic drugs, and certain injectable diabetes and weight-loss medicines slow stomach emptying; sometimes stopping or adjusting a medication resolves the problem.
  • Viral illness: Gastroparesis occasionally follows a viral infection and may slowly improve over months.
  • Idiopathic: In a large share of cases, no cause is ever identified.
Symptoms:
  • Nausea and vomiting: Vomiting of undigested food eaten hours earlier is characteristic.
  • Early fullness: Feeling full after only a few bites, with uncomfortable fullness lasting long after meals.
  • Bloating and upper abdominal pain: Often daily and worse after eating.
  • Heartburn and regurgitation: Food lingering in the stomach worsens reflux, overlapping with GERD.
  • Erratic blood sugar: In people with diabetes, unpredictable stomach emptying makes glucose swing unpredictably — sometimes the first clue to the diagnosis.
  • Weight loss and poor nutrition: In more severe cases.
Diagnosis: The first step is an upper endoscopy or imaging to make sure a physical blockage — such as an ulcer or narrowing — is not the real problem. The standard confirmatory test is a gastric emptying study: you eat a small meal tagged with a tiny amount of radioactive tracer, and a scanner measures how much remains in the stomach over four hours. Breath tests and a swallowed motility capsule are alternatives in some settings. Your doctor will also review your medication list carefully, since drug-induced slowing is common and reversible, and will avoid labeling the problem gastroparesis on symptoms alone, because several other conditions can mimic it. Treatment:
  • Dietary changes — the foundation: Smaller, more frequent meals; choosing lower-fat and lower-fiber foods, which leave the stomach faster; chewing thoroughly; walking after meals; and shifting toward soups, smoothies, and other liquids on difficult days, since liquids empty more easily than solids. A dietitian familiar with gastroparesis can be a valuable partner.
  • Blood sugar control: In diabetic gastroparesis, steadier glucose improves stomach function over time, and the care team adjusts insulin timing around delayed meals.
  • Prokinetic medication: Metoclopramide, which stimulates stomach contractions, is used at the lowest effective dose for limited periods because of potential neurologic side effects; erythromycin is sometimes used short-term.
  • Anti-nausea medication: Ondansetron or promethazine can relieve nausea and make eating possible.
  • Advanced options: For severe cases, specialists may consider gastric electrical stimulation, endoscopic procedures on the pyloric valve, or temporary feeding-tube support to maintain nutrition.
When to Seek Care: Seek urgent care if you cannot keep liquids down, show signs of dehydration such as dizziness or very dark urine, vomit blood, or have rapid weight loss. Gastroparesis is a long-term condition, but most people find a routine that controls symptoms and protects nutrition. The internal-medicine team at Zimmer Medical Group can coordinate testing, review your medications, and manage gastroparesis alongside diabetes and reflux care.

Related Medications

Commonly prescribed medications for this condition

OndansetronPromethazine

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