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Medications for Preventing Organ Rejection | 마이메르시 MyMerci
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Medications for Preventing Organ Rejection

NCLEX Review Guide: Medications for Preventing Organ Rejection

Immunosuppressive Medications Overview

Primary Immunosuppressants

  • Tacrolimus (Prograf): Calcineurin inhibitor that prevents T-cell activation by blocking IL-2 production. Monitor for nephrotoxicity and neurotoxicity.
  • Cyclosporine (Neoral, Sandimmune): Another calcineurin inhibitor with similar mechanism but higher risk of gingival hyperplasia and hirsutism.
  • Mycophenolate (CellCept): Inhibits purine synthesis in lymphocytes, causing GI upset and increased infection risk.
  • Azathioprine (Imuran): Antimetabolite that interferes with DNA synthesis, requiring CBC monitoring for bone marrow suppression.

Key Points

  • Triple therapy typically includes: calcineurin inhibitor + antimetabolite + corticosteroid
  • Therapeutic drug monitoring is essential for tacrolimus and cyclosporine
  • All immunosuppressants increase infection and malignancy risk

Critical Nursing Considerations

Monitoring Parameters

Critical Alert: Never abruptly discontinue immunosuppressants - risk of acute rejection
  1. Monitor trough levels for tacrolimus (5-15 ng/mL) and cyclosporine (100-300 ng/mL)
  2. Assess renal function (BUN, creatinine) - both drugs are nephrotoxic
  3. Monitor CBC for bone marrow suppression, especially with azathioprine
  4. Assess for signs of infection (fever, unusual fatigue, sore throat)
  5. Monitor blood pressure - hypertension is common side effect

Memory Aid: "TRIM" for Tacrolimus Monitoring

  • Trough levels (before morning dose)
  • Renal function (creatinine)
  • Infection signs
  • Magnesium levels (can be depleted)

Commonly Confused Concepts

Medication Unique Side Effects Key Monitoring
Tacrolimus Neurotoxicity, diabetes, alopecia Trough levels, glucose
Cyclosporine Gingival hyperplasia, hirsutism Trough levels, dental care
Mycophenolate GI upset, diarrhea CBC, GI symptoms

Drug Interactions

  • CYP3A4 inhibitors (grapefruit juice, ketoconazole) increase tacrolimus/cyclosporine levels
  • CYP3A4 inducers (phenytoin, rifampin) decrease immunosuppressant effectiveness
  • Live vaccines are contraindicated in immunosuppressed patients

Clinical Application

Clinical Scenario

A kidney transplant patient on tacrolimus reports tremors, confusion, and elevated creatinine. Tacrolimus trough level is 25 ng/mL (therapeutic: 5-15 ng/mL).

Nursing Action: Hold next dose, notify physician immediately, and prepare for dose reduction. Monitor neurological status and renal function closely.

Patient Education Priorities

  • Take medications at same time daily, preferably on empty stomach for tacrolimus
  • Avoid grapefruit juice and St. John's wort which affect drug metabolism
  • Practice strict infection prevention: hand hygiene, avoid crowds, report fever immediately
  • Use sunscreen and protective clothing due to increased skin cancer risk

Study Tips & Memory Aids

Memory Aid: "REJECT" for Rejection Prevention

  • Regular medication adherence
  • Evaluate drug levels routinely
  • Just say no to live vaccines
  • Examine for infection signs
  • Compliance with follow-up labs
  • Teach about drug interactions

Quick Check Questions

  • □ Can you name the three main classes of immunosuppressants?
  • □ What are the therapeutic trough levels for tacrolimus?
  • □ Which immunosuppressant causes gingival hyperplasia?
  • □ Why should patients avoid grapefruit juice?
Common Pitfalls:
  • Don't confuse tacrolimus and cyclosporine - both are calcineurin inhibitors but have different side effect profiles
  • Remember: Trough levels are drawn before the morning dose, not after
  • Immunosuppression is lifelong - never stop medications without physician approval

You're mastering complex pharmacology! Remember, understanding immunosuppressive therapy is crucial for transplant nursing. Each medication you learn brings you closer to providing excellent patient care and passing your NCLEX with confidence!

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