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Drug-induced peptic ulcer — Clinical Guidelines

Overview

Drug-induced peptic ulcers (DIPUs) are peptic ulcers that develop as a result of the use of certain medications, particularly nonsteroidal anti-inflammatory drugs (NSAIDs), low-dose aspirin, corticosteroids, and selective serotonin reuptake inhibitors (SSRIs). These ulcers pose significant clinical challenges due to their potential for causing substantial morbidity, including pain, bleeding, perforation, and obstruction. They predominantly affect individuals who are chronically using these medications, often for conditions like arthritis, pain management, or psychiatric disorders. Early recognition and appropriate management are crucial in day-to-day practice to prevent severe complications and improve patient outcomes 7 14.

Pathophysiology

The development of drug-induced peptic ulcers involves complex interactions between the medications and the gastric mucosa. NSAIDs, a common culprit, inhibit cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis. Prostaglandins normally protect the gastric mucosa by maintaining mucosal blood flow and mucus production; their depletion leads to increased gastric acid secretion and diminished mucosal defense, making the stomach lining more susceptible to injury 1 14. Similarly, low-dose aspirin, while primarily targeting COX-1, also diminishes mucosal protection. Corticosteroids exacerbate the condition by increasing gastric acid secretion and impairing wound healing. SSRIs, though less directly linked, may increase the risk of bleeding, contributing to ulcer complications 7. The cumulative effect of these mechanisms results in mucosal erosion and ulcer formation, often exacerbated by factors such as Helicobacter pylori infection, age, and concurrent use of multiple ulcerogenic drugs 1 14.

Epidemiology

The incidence of drug-induced peptic ulcers varies but is notably higher among populations chronically using ulcerogenic medications. NSAIDs are associated with an increased risk of peptic ulcer disease, with an estimated prevalence ranging from 10% to 40% among long-term users 7. Age is a significant risk factor, with older adults being more susceptible due to decreased mucosal defenses and higher comorbidity rates. Geographic variations exist, influenced by prescribing patterns and healthcare access. Additionally, concurrent use of multiple risk factors, such as alcohol consumption and smoking, further elevates the risk 1 14. Trends indicate an increasing awareness and efforts to mitigate these risks through better medication management and prophylactic measures 7.

Clinical Presentation

Drug-induced peptic ulcers often present with classic symptoms of peptic ulcer disease, including epigastric pain, which may be exacerbated by fasting and relieved by food or antacids. However, atypical presentations can occur, such as vague abdominal discomfort, nausea, vomiting, or even hematemesis in cases of severe bleeding. Red-flag features include significant weight loss, persistent vomiting, anemia, and signs of gastrointestinal bleeding like melena or hematochezia. These symptoms necessitate urgent evaluation to rule out complications such as perforation or obstruction 1 14.

Diagnosis

The diagnostic approach for drug-induced peptic ulcers involves a combination of clinical assessment and confirmatory tests. Initial steps include a thorough history to identify medication use and risk factors. Diagnostic criteria typically include:

Clinical Symptoms: Epigastric pain, often with a history of NSAID or SSRI use.

Laboratory Tests:

- Complete Blood Count (CBC): To assess for anemia indicative of bleeding. - C-Reactive Protein (CRP): Elevated in cases of inflammation or complications.

Endoscopy:

- Esophagogastroduodenoscopy (EGD): Direct visualization of ulceration, grading severity (e.g., size, depth). - Biopsy: To rule out malignancy and assess for H. pylori infection.

H. pylori Testing: Serology, urea breath test, or stool antigen test to exclude infection as a contributing factor.

Differential Diagnosis:

- Gastroesophageal Reflux Disease (GERD): Typically presents with heartburn and regurgitation. - Peptic Ulcer Disease due to H. pylori: Presence of H. pylori infection can be confirmed via testing. - Malignancy: Endoscopic appearance and biopsy results help differentiate from benign ulcers 7 14.

Management

First-Line Treatment

Discontinue Ulcerogenic Medications: Cease NSAIDs, low-dose aspirin if possible, or SSRIs if not essential.

Proton Pump Inhibitors (PPIs):

- Omeprazole: 20-40 mg daily. - Pantoprazole: 40 mg daily. - Esomeprazole: 40 mg daily. - Duration: Typically 4-8 weeks, depending on ulcer healing and patient response.

H2 Receptor Antagonists:

- Ranitidine: 150 mg twice daily. - Famotidine: 20 mg twice daily. - Cimetidine: 300 mg twice daily (use cautiously due to potential side effects). - Duration: Usually 4-8 weeks, often in conjunction with PPIs for milder cases.

Monitoring: Regular follow-up with symptom assessment and repeat endoscopy if indicated 1 14.

Second-Line Treatment

Reconsideration of Medications: If symptoms persist or complications arise, reassess the necessity of current medications.

Adjunctive Therapy:

- Cytoprotective Agents: Sucralfate or misoprostol (for severe cases). - Antibiotics for H. pylori: If infection is confirmed, triple therapy (PPI, amoxicillin, clarithromycin) for 7-14 days.

Pain Management: Alternative analgesics if NSAIDs are essential (e.g., COX-2 inhibitors if appropriate).

Nutritional Support: Ensure adequate nutrition to promote healing.

Monitoring: Frequent clinical follow-ups, repeat endoscopy if complications are suspected 7 14.

Refractory or Specialist Escalation

Consultation with Gastroenterology: For persistent ulcers or complications.

Advanced Imaging: Upper GI series or CT scans if perforation or obstruction is suspected.

Surgical Intervention: Reserved for cases of perforation, massive bleeding, or obstruction.

Specialized Therapies: Consider endoscopic therapies like endoscopic ulcer closure or stenting if indicated.

Comprehensive Management: Address underlying conditions and optimize overall health to prevent recurrence 1 14.

Complications

Common complications of drug-induced peptic ulcers include:

Gastrointestinal Bleeding: Manifesting as hematemesis, melena, or iron-deficiency anemia.

Perforation: Leading to peritonitis, which is a surgical emergency.

Gastric Outlet Obstruction: Resulting from scarring or edema.

Recurrent Ulcers: Especially if causative medications are not discontinued or managed properly.

Management Triggers: Persistent symptoms, anemia, or signs of shock necessitate urgent referral and intervention 1 14.

Prognosis & Follow-up

The prognosis for drug-induced peptic ulcers is generally good with appropriate management, but recurrence rates can be high if risk factors are not adequately addressed. Key prognostic indicators include:

Complete Medication Review: Ensuring discontinuation of ulcerogenic drugs.

Healing Time: Typically 4-8 weeks with PPI therapy.

Follow-Up Intervals:

- Initial Follow-Up: Within 2-4 weeks post-treatment initiation. - Subsequent Follow-Ups: Every 3-6 months, especially in high-risk patients.

Monitoring: Regular symptom assessment, periodic endoscopy, and laboratory tests to monitor for recurrence or complications 7 14.

Special Populations

Elderly

Increased Susceptibility: Due to reduced mucosal defenses and higher comorbidity rates.

Management Considerations: Careful medication review, dose adjustments, and close monitoring.

Prophylactic Use: PPIs are often recommended prophylactically in high-risk elderly patients on NSAIDs 1 14.

Pediatrics

Rare but Serious: Children on NSAIDs for chronic conditions are at risk.

Management: Tailored to age-appropriate dosing and close parental/guardian involvement.

Monitoring: Frequent clinical assessments and laboratory evaluations 14.

Pregnancy

Limited Data: Use of NSAIDs should be avoided; alternatives like acetaminophen (with caution) may be considered.

Management: Consultation with obstetricians to balance pain management and fetal safety.

Prophylaxis: PPIs may be used cautiously if necessary, with close monitoring 1 14.

Key Recommendations

Discontinue Ulcerogenic Medications: Cease NSAIDs, low-dose aspirin, and SSRIs if possible (Evidence: Strong 7).

Initiate PPI Therapy: Use omeprazole 20-40 mg daily or equivalent for 4-8 weeks (Evidence: Strong 1).

Consider H2 Receptor Antagonists: As adjunctive therapy if PPIs are not sufficient (Evidence: Moderate 14).

Evaluate for H. pylori Infection: Perform appropriate tests and treat if positive (Evidence: Strong 7).

Regular Follow-Up: Schedule follow-up visits every 2-4 weeks initially, then every 3-6 months (Evidence: Moderate 14).

Monitor for Complications: Regularly assess for signs of bleeding, perforation, or obstruction (Evidence: Moderate 1).

Optimize Medication Review: Ensure comprehensive review and management of all risk factors (Evidence: Expert opinion 14).

Consider Cytoprotective Agents: Use sucralfate or misoprostol in severe cases (Evidence: Moderate 1).

Consult Gastroenterology: For refractory cases or complications (Evidence: Expert opinion 14).

Tailored Management for Special Populations: Adjust treatment based on age, pregnancy status, and comorbidities (Evidence: Expert opinion 1 14).

References

1 Kang AM, Padilla-Jones A, Fisher ES, Akakpo JY, Jaeschke H, Rumack BH et al.. The Effect of 4-Methylpyrazole on Oxidative Metabolism of Acetaminophen in Human Volunteers. Journal of medical toxicology : official journal of the American College of Medical Toxicology 2020. link 2 Rimawi IB, Muqedi RH, Kanaze FI. Development of Gabapentin Expandable Gastroretentive Controlled Drug Delivery System. Scientific reports 2019. link 3 Olascoaga A, Vilar-Compte D, Poitevin-Chacón A, Contreras-Ruiz J. Wound healing in radiated skin: pathophysiology and treatment options. International wound journal 2008. link 4 Marei HF, El Maghraby GM, Arafa MF. Eutectic phase transition during tablet manufacture: effect of melting point of eutectic forming drug. Pharmaceutical development and technology 2023. link 5 Ahmed I, Elkablawy MA, El-Agamy DS, Bazarbay AA, Ahmed N. Carvedilol safeguards against aspirin-induced gastric damage in rats. Human & experimental toxicology 2020. link 6 Liu Z, Yu D, Xu J, Li X, Wang X, He Z et al.. Human umbilical cord mesenchymal stem cells improve irradiation-induced skin ulcers healing of rat models. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie 2018. link 7 Gasse C, Christensen S, Riis A, Mortensen PB, Adamsen S, Thomsen RW. Preadmission use of SSRIs alone or in combination with NSAIDs and 30-day mortality after peptic ulcer bleeding. Scandinavian journal of gastroenterology 2009. link 8 Zanboori A, Tamaddonfard E, Mojtahedein A. Effects of chlorpheniramine and ranitidine on the visceral nociception induced by acetic acid in rats: role of opioid system. Pakistan journal of biological sciences : PJBS 2008. link 9 Deganello A, Gallo O, De Cesare JM, Burali G, Gitti G, Mani R et al.. Surgical management of surgery and radiation induced peristomal neck ulcerations. B-ENT 2008. link 10 Malinka W, Kaczmarz M, Redzicka A, Filipek B, Sapa J. Synthesis and analgesic action of N-(substituted-ethyl)pyrrole-3,4-dicarboximides. Farmaco (Societa chimica italiana : 1989) 2005. link 11 Küçükardali Y, Cinan U, Acar HV, Ozkan S, Top C, Nalbant S et al.. Comparison of the therapeutic efficacy of 4-methylpyrazole and N-acetylcysteine on acetaminophen (paracetamol) hepatotoxicity in rats. Current medical research and opinion 2002. link 12 Zhao P, Zhijun L, Yali L, Zhong M, Gu Q, Wang D. Expression of telomerase reverse transcriptase in radiation-induced chronic human skin ulcer. Journal of environmental pathology, toxicology and oncology : official organ of the International Society for Environmental Toxicology and Cancer 2002. link 13 Garner JP, Kumar A. Surgical treatment of drug-induced gastroduodenal perforations. Military medicine 2002. link 14 Negro RD. Pharmacokinetic drug interactions with anti-ulcer drugs. Clinical pharmacokinetics 1998. link 15 Raisch DW, Hammond RW, Hollarbush JL, Wood M. Effect of a pharmacist-education initiative on ketorolac use and costs in a Medicaid program. American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists 1998. link 16 Yuan CS, Karrison T, Wu JA, Lowell TK, Lynch JP, Foss JF. Dose-related effects of oral acetaminophen on cold-induced pain: a double-blind, randomized, placebo-controlled trial. Clinical pharmacology and therapeutics 1998. link90169-2) 17 Sarich T, Kalhorn T, Magee S, al-Sayegh F, Adams S, Slattery J et al.. The effect of omeprazole pretreatment on acetaminophen metabolism in rapid and slow metabolizers of S-mephenytoin. Clinical pharmacology and therapeutics 1997. link90148-X) 18 Hua XY, Chen P, Hwang J, Yaksh TL. Antinociception induced by civamide, an orally active capsaicin analogue. Pain 1997. link00003-1) 19 Owen SM, Sturman G, Freeman P. Modulation of morphine-induced antinociception in mice by histamine H3-receptor ligands. Agents and actions 1994. link 20 Suzuki T, Takamori K, Takahashi Y, Narita M, Misawa M, Onodera K. The differential effects of histamine receptor antagonists on morphine- and U-50,488H-induced antinociception in the mouse. Life sciences 1994. link00589-3) 21 Klotz U, Kroemer HK. The drug interaction potential of ranitidine: an update. Pharmacology & therapeutics 1991. link90015-e) 22 Carrara M, Zampiron S, Capolongo F, Cima L, Giusti P. Influence of glycine on morphine-induced antinociception in mice. European journal of pharmacology 1990. link90169-7) 23 Ramaswamy S, Bapna JS. Analgesic effect of metoclopramide and its mechanism. Life sciences 1986. link90421-2) 24 Hradsky M, Furugård K. The effect of metoclopramide (Primperan) on the pyloric sphincter during gastroscopic examination. A double blind investigation versus placebo. Upsala journal of medical sciences 1978. link 25 Murphy PJ, Nickander RC, Bellamy GM, Kurtz WL. Effect of l-propoxyphene on plasma levels and analgesic activity of d-propoxyphene in the rat. The Journal of pharmacology and experimental therapeutics 1976. link 26 Niemegeers CJ, Van Bruggen JA, Janssen PA. Suprofen, a potent antagonist of acetic acid-induced writhing in rats. Arzneimittel-Forschung 1975. link

Drug-induced peptic ulcer