Gastroparesis is delayed stomach emptying without any physical blockage, and it produces nausea, vomiting, bloating, and fullness after only a few bites. Many patients spend years cycling through restricted diets and medications that never bring lasting relief. At Houston Heartburn & Reflux Center, Dr. Elias Darido evaluates every patient personally, confirms the diagnosis with objective testing, and explains every option clearly, including surgery when symptoms stop responding to medical management.
Gastroparesis is a condition in which the stomach moves food into the small intestine far more slowly than it should, with no blockage causing the delay. Dr. Darido treats patients throughout Houston, TX, and some travel from outside Texas after being told nothing more can be done. Because his practice focuses on acid reflux and the upper digestive tract, he sees a high volume of patients whose heartburn and delayed emptying occur together, a combination that is frequently missed.
What Is Gastroparesis?
Your stomach is a muscular pump. Coordinated contractions grind food and push it forward, and the lower third, called the antrum, does most of that work. In gastroparesis, those contractions weaken or lose coordination, so food sits for hours. The ACG guideline defines gastroparesis as symptoms of food retention plus objective evidence of delayed gastric emptying, with no mechanical obstruction at the stomach outlet.
That last part matters, because scar tissue, an ulcer, or a tumor can cause identical symptoms and needs entirely different treatment. Testing comes before any treatment decision. The condition is also hard to count, since population-based data is limited, though diagnoses and hospitalizations appear to be rising.
What Are the Symptoms of Gastroparesis?
Nausea and vomiting are the defining symptoms, usually alongside bloating and uncomfortable fullness after meals, according to a European consensus. Patients also describe:
- Feeling full after a few bites, then uncomfortably full for hours
- Vomiting food eaten hours earlier, sometimes undigested
- Upper abdominal pain, pressure, or visible distension
- Heartburn and regurgitation
- Unintended weight loss, dehydration, or unpredictable blood sugar
One point matters for patients dismissed elsewhere: symptom severity does not track neatly with how delayed your emptying looks on testing, as an AGA review notes. A modest delay can still cause severe symptoms.
The daily toll is heavy. Among patients with diabetes and gastroparesis symptoms, one study found impaired quality of life, with 47% reporting anxiety symptoms and 38% reporting depression symptoms.
What Causes Gastroparesis?
Diabetes is the best understood cause, because long-standing or poorly controlled diabetes damages the nerves that coordinate stomach contractions. In the only community-based study of its kind, the 10-year cumulative incidence was roughly 5% in type 1 diabetes and 1% in type 2 diabetes.
Other recognized causes include prior stomach or esophageal surgery, vagus nerve injury, viral infection, opioid and anticholinergic medications, neurological conditions, connective tissue diseases such as scleroderma, and hypothyroidism. In many patients, testing confirms delayed emptying but no cause is ever found. That is called idiopathic gastroparesis, and it is treated just as seriously.
Is It Heartburn or Gastroparesis?
This is the question Dr. Darido answers most often, and getting it wrong costs patients years. Reflux symptoms overlap substantially with gastroparesis and functional dyspepsia. When food sits too long, pressure builds and acid is pushed upward, so gastroparesis can look exactly like stubborn acid reflux disease.
The consequence is that acid-suppressing medication alone often fails these patients, and reflux surgery performed without recognizing delayed emptying can leave someone worse off. Dr. Darido has written directly about GERD versus gastroparesis. Both can be present at once, and both need measuring before surgical intervention.
Diagnosis follows a sequence. First, upper endoscopy rules out an ulcer, narrowing, or mass. Second, emptying is measured objectively. The 2025 AGA guideline recommends a 4-hour gastric emptying study and advises against the shorter 2-hour version, which misses cases. Medications that slow the stomach and elevated blood sugar are addressed first, since both distort results.
Because reflux and delayed emptying frequently coexist, Dr. Darido may add motility testing such as pH monitoring, impedance testing, manometry, or an upper GI contrast study. The goal is a full picture of how your stomach and esophagus function, not a diagnosis assembled from symptoms.
How Is Gastroparesis Treated?
Treatment starts conservatively and escalates only as needed.
Diet comes first: smaller and more frequent meals, lower fat and fiber, softer textures, and steady hydration. For patients with diabetes, tightening glucose control is part of treatment, not separate from it. Medication review matters too, since opioids and other agents that slow the stomach can be the entire problem.
For medication, the AGA guideline conditionally recommends metoclopramide or erythromycin as initial therapy. Metoclopramide carries real limits: the FDA boxed warning advises against use beyond 12 weeks, because the risk of tardive dyskinesia, a potentially irreversible movement disorder, rises with duration and dose. Antiemetics control nausea but do not improve emptying.
The same guideline advises against routine early use of pyloromyotomy or gastric stimulation, reserving both for selected patients whose symptoms resist medical therapy.
This is the patient Dr. Darido sees most: someone with medically refractory gastroparesis, years into it, sometimes dependent on a feeding tube, who has been told there is nothing left to try.
He is direct about the evidence. No established surgical guideline exists for medically refractory gastroparesis. He is equally direct that standard Gastric Sleeve Surgery is the wrong operation here, because it removes part of the antrum, the pump that drives emptying.
For patients who reach this point, Dr. Darido has developed a surgical option designed specifically for this problem: Antrum-Preserving Longitudinal Gastrectomy (APLG). Learn more about APLG surgery.
Dr. Elias Darido, MD, FACS, is the only physician at Houston Heartburn & Reflux Center, so the surgeon who reviews your gastric emptying study is the one who performs your operation and follows you afterward.
He is board certified by the American Board of Surgery and a Fellow of the American College of Surgeons, with fellowship training in advanced laparoscopic surgery of the upper digestive tract at the University of North Carolina, Chapel Hill, plus fellowship training in metabolic and bariatric surgery. He has over 15+ years in specialized practice and has performed more than 1,000 Nissen Fundoplications.
What sets his gastroparesis practice apart is a documented research interest in this exact problem. He published on longitudinal gastrectomy for diabetic gastroparesis in Surgery for Obesity and Related Diseases, and peer reviews for that journal, the World Journal of Surgery, and Obesity Surgery. He is a member of the American Gastroenterological Association, SAGES, ASMBS, and the Texas Medical Association.
What Patients Are Saying
I cannot express enough gratitude to Dr. Darido for saving my life. I was suffering from severe gastroparesis, and my condition had reached a point where I was ready to give up. I relied on a G/J Tube for daily venting and a Central Line for TPN, and I could barely get out of bed due to debilitating nausea and excruciating pain. Multiple doctors had told me there was nothing more they could do, and I was left to believe that my life was coming to an end.
In a desperate search for hope, I came across Dr. Darido through a Facebook support group and decided to seek his help as a last resort. From the moment I met him, I knew I was in the right hands. He performed surgery, and almost immediately, I began to feel better.
Over time, my improvement has been nothing short of miraculous. My G/J Tube was removed, followed by my Central Line, and just this week, a follow-up test confirmed that my gastroparesis is completely gone. After almost five years, I can eat and drink again. Four months post-op, I feel 20 years younger and am back to living a life that is enjoyable and full of joy.
Dr. Darido’s expertise, compassion, and dedication gave me back the life I thought I had lost. I wholeheartedly recommend him to anyone facing similar challenges. He truly is a life-saver.
*Individual results vary, and these experiences do not predict any outcome.
FAQs About Gastroparesis?
How long does a gastric emptying study take?
Plan for about four hours. You eat a standardized meal containing a small amount of tracer, then imaging measures how much food remains in your stomach through hour four.
Will insurance cover gastroparesis treatment?
Coverage varies by plan and procedure. Our team verifies your benefits before scheduling and reviews what your policy covers, so you are not guessing.
Can I eat normally again?
Many patients tolerate a much broader diet after successful treatment, and some return to regular meals. Your severity, cause, and nutritional status all affect the result, so Dr. Darido sets realistic expectations rather than promises.
Do I need a referral from my gastroenterologist?
No referral is required. Bring any prior endoscopy reports, gastric emptying results, and imaging, since existing records often shorten the workup.
- Camilleri M, Kuo B, Nguyen L, et al. “ACG Clinical Guideline: Gastroparesis.” Am J Gastroenterol. 2022;117(8):1197-1220. DOI — Supports the definition of gastroparesis and the requirement to exclude mechanical obstruction.
- Moshiree B, Potter M, Talley NJ. “Epidemiology and Pathophysiology of Gastroparesis.” Gastrointest Endosc Clin N Am. 2019;29(1):1-14. DOI — Supports limited population-based prevalence data and rising diagnoses/hospitalizations.
- Schol J, Wauters L, Dickman R, et al. “UEG and ESNM consensus on gastroparesis.” United European Gastroenterol J. 2021;9(3):287-306. DOI — Supports nausea and vomiting as cardinal symptoms with coexisting postprandial dyspepsia, and the risk factor list.
- Lacy BE, Tack J, Gyawali CP. “AGA Clinical Practice Update on Management of Medically Refractory Gastroparesis.” Clin Gastroenterol Hepatol. 2021;20(3):491-500. DOI — Supports that symptoms do not correlate well with degree of emptying delay.
- Teigland T, Iversen MM, Sangnes DA, et al. “A longitudinal study on patients with diabetes and symptoms of gastroparesis.” J Diabetes Complications. 2018;32(1):89-94. DOI — Supports impaired quality of life, with 47% reporting anxiety symptoms and 38% reporting depression symptoms.
- Bharucha AE. “Epidemiology and natural history of gastroparesis.” Gastroenterol Clin North Am. 2015;44(1):9-19. DOI — Supports a 10-year cumulative incidence of roughly 5% in type 1 diabetes and 1% in type 2 diabetes.
- Richter JE, Rubenstein JH. “Presentation and Epidemiology of Gastroesophageal Reflux Disease.” Gastroenterology. 2018;154(2):267-276. DOI — Supports substantial symptom overlap between GERD, functional dyspepsia, and gastroparesis.
- Staller K, Parkman HP, Greer KB, et al. “AGA Clinical Practice Guideline on Management of Gastroparesis.” Gastroenterology. 2025;169(5):828-861. DOI — Supports three claims cited on this page: 4-hour testing recommended over 2-hour; metoclopramide or erythromycin as initial therapy; against routine initial G-POEM or gastric electrical stimulation.
- U.S. FDA. Reglan (metoclopramide) tablets prescribing information, boxed warning. FDA label — Supports the 12-week limit and tardive dyskinesia risk.
- Darido E, Farrell TM. “Laparoscopic longitudinal gastrectomy and duodenojejunostomy for treatment of diabetic gastroparesis.” Surg Obes Relat Dis. 2012;8(6):811-813. DOI — Supports Dr. Darido’s published research on gastroparesis surgery.
