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Gastric Protectants | 마이메르시 MyMerci
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Gastric Protectants

NCLEX Review Guide: Gastric Protectants

Gastric Protectant Medications

Proton Pump Inhibitors (PPIs)

  • Omeprazole (Prilosec), Lansoprazole (Prevacid), Pantoprazole (Protonix) - Block hydrogen-potassium ATPase enzyme system, reducing gastric acid production by up to 90%.
  • Mechanism: Irreversibly bind to proton pumps in gastric parietal cells, requiring 3-5 days for full therapeutic effect.
  • Take 30-60 minutes before meals on empty stomach for optimal absorption and effectiveness.

Memory Aid: "PPI Before Breakfast"

Proton Pump Inhibitors work best when taken Before the first meal of the day!

Key Points

  • Long-term use (>1 year) increases risk of osteoporosis, B12 deficiency, and C. diff infections
  • Cannot be crushed - enteric-coated to prevent gastric acid degradation
  • Interact with warfarin, increasing bleeding risk

H2 Receptor Antagonists

  • Famotidine (Pepcid), Ranitidine (Zantac), Cimetidine (Tagamet) - Block histamine-2 receptors on gastric parietal cells, reducing acid secretion by 60-70%.
  • Faster onset than PPIs (1-2 hours) but less potent acid suppression overall.
  • Cimetidine has multiple drug interactions due to cytochrome P450 enzyme inhibition.

Key Points

  • Can be taken with or without food, unlike PPIs
  • Tolerance may develop with long-term use
  • Safer for elderly patients than PPIs for short-term use

Cytoprotective Agents

  • Sucralfate (Carafate) - Forms protective barrier over ulcerated tissue, promoting healing without systemic absorption.
  • Administration: Take on empty stomach 1 hour before meals and at bedtime for maximum mucosal contact.
  • Separate from other medications by 2 hours - can bind to and reduce absorption of other drugs.

Key Points

  • Requires acidic environment to activate - do not give with antacids
  • Minimal systemic side effects due to local action
  • May cause constipation as primary adverse effect

Clinical Applications & Nursing Considerations

Clinical Scenario

A 45-year-old patient with GERD is prescribed omeprazole 20mg daily. The patient asks when to take the medication and mentions taking it with dinner.

Nursing Action: Educate patient to take omeprazole 30-60 minutes before breakfast on empty stomach for optimal effectiveness.

Gastric Protectant Comparison

MedicationOnsetDurationBest Timing
PPIs3-5 days24+ hoursBefore breakfast
H2 Blockers1-2 hours6-12 hoursWith or without food
Sucralfate30 minutes6 hoursEmpty stomach

    PPI Administration Protocol

  1. Assess patient's current symptoms and medication history
  2. Administer 30-60 minutes before first meal of day
  3. Ensure capsule is swallowed whole (do not crush)
  4. Monitor for therapeutic response over 3-5 days
  5. Assess for long-term complications if used >1 year

Common Pitfalls & Study Tips

NCLEX Memory Tricks

  • "PPI = Pre-meal Proton Inhibitor" - Always before meals
  • "Sucralfate = Stomach Coating" - Needs empty stomach to coat properly
  • "H2 = Histamine Helper" - More flexible timing than PPIs

High-Yield NCLEX Points

  • PPIs increase fracture risk in elderly - monitor bone density
  • Sucralfate can decrease absorption of digoxin, warfarin, phenytoin
  • H2 blockers safer for acute stress ulcer prophylaxis in ICU

Quick Check Questions

  • □ Can you name the optimal timing for PPI administration?
  • □ Do you know which gastric protectant requires acidic environment?
  • □ Can you identify drug interactions with each class?
  • □ Do you understand long-term complications of PPI use?

Remember: You're building the knowledge and skills to provide excellent patient care. Each concept you master brings you closer to becoming the nurse your patients need. Stay focused and trust your preparation!

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