Transplant Drugs

Transplant Drugs - Chapter 33

Introduction

  • Focus on medications related to transplant rejection as presented in the slides.

Learning Objectives

  • Differentiate between the three drugs used in the treatment of transplant rejection.

  • Describe the nurse’s role in promoting adherence to the therapeutic drug regimen.

  • Apply the nursing process for each of the transplant drugs.

Organ Transplantation

  • General overview of organ transplantation:

    • Cadaveric transplantation: Organ transplants from deceased donors.

    • Living-donor transplantation: Organ transplants from living persons.

  • Principles of Immunosuppression:

    • The immune system employs effective mechanisms to combat foreign organisms.

    • These immune responses are implicated in the rejection of transplanted organs.

    • Immunosuppression and Immunosuppressant drugs are crucial to prevent organ rejection.

    • Transplant recipients should not receive live vaccines due to suppressed immune response.

Induction Therapy

  • Definition: Induction therapy provides intense immunosuppression utilizing drugs aimed at reducing antigen presentation and T-cell response.

  • Objective: Minimize the risk of acute rejection during the initial period post-transplantation.

Induction Drug: Basiliximab

  • Indication: Primarily used for kidney transplant recipients.

  • Classification: Monoclonal antibody.

  • Mechanism of Action: Inhibits lymphocyte activation, preventing an immune response against the transplanted organ.

  • Side Effects:

    • Abdominal and back pain

    • Fatigue, weakness

    • Fever and chills

    • Dizziness, cough, sore throat, dyspnea

    • Nausea, vomiting, dysuria

    • Edema, tremor, malignancy risks

    • Blood dyscrasias (low CBC), sepsis, superinfection

    • Cytokine release syndrome

    • Diabetes mellitus, capillary leak syndrome

    • Anaphylaxis

Immunosuppressant Drugs: Maintenance Therapy

  • Calcineurin Inhibitors:

    • Drug: Cyclosporine.

    • Mechanism of Action: Binds to cytoplasmic proteins, inhibiting calcineurin phosphatase to suppress T-lymphocyte proliferation.

    • Use: Primarily to prevent organ rejection.

  • Common Side Effects:

    • Dizziness, headache, cough

    • Fever, pruritus, insomnia

    • GI distress, dyspnea, edema, hypertension

    • Electrolyte, metabolic, and lipid abnormalities

    • Hyperglycemia, Steven Johnson syndrome

    • Blood dyscrasias, infection, seizures

    • Neurotoxicity, nephrotoxicity, hepatotoxicity.

  • Cautions:

    • Patients should avoid grapefruit and grapefruit juice.

    • Cyclosporine may be taken with orange or apple juice to improve taste.

Maintenance Therapy: Corticosteroids

  • Drug: Prednisone.

  • Mechanism of Action: Decreases inflammation and suppresses the immune system.

  • Use: Particularly effective in cases of acute transplant rejection.

Drugs for Transplant Rejection

  • Drug Class: Muromonab-CD3.

  • Mechanism of Action: Binds to the CD3 complex on T lymphocytes, which facilitates the removal of CD3 positive T lymphocytes from circulation.

  • Side Effects:

    • Fever, chills, diaphoresis

    • Headache, dyspnea

    • GI distress, tremor, rash, pruritus, edema, fatigue

    • Hypotension, tachycardia, arthralgia, seizures

    • Blood dyscrasias, infections, cytokine release syndrome

    • Serious side effects include cardiorespiratory arrest, encephalopathy, malignancy, aseptic meningitis, lymphoproliferative disorders, thrombosis, and anaphylaxis, including Stevens-Johnson syndrome.

Drugs for Opportunistic Infections

  • Pneumocystis Jiroveci Pneumonia:

    • Treatment: Trimethoprim-sulfamethoxazole.

  • Bacterial Infections:

    • Treatment: Nystatin, used to prevent or treat thrush in the mouth and esophagus.

  • Cytomegalovirus:

    • Prevention: Ganciclovir, valganciclovir.

Promoting Adherence

  • Significance: Nonadherence can lead to transplant failure.

  • Nursing Roles:

    • Educate patients about medications.

    • Encourage motivational strategies for adherence.

    • Help improve recipients’ coping skills.

Nursing Process: Organ Transplants - Immunosuppression

Concept

  • Focus on safety and immunity.

Assessment

  • Assess for clinical signs of rejection.

  • Evaluate for risk factors for infection.

  • Observe for signs and symptoms of infection.

  • Review immunization status if applicable.

Nursing Diagnosis

  • Goal: Ensure the transplant recipient remains free of infection.

Planning

  • Encourage a balanced and healthy diet complemented by exercise.

  • Instruct on adherence to the drug regimen.

  • Advise on avoiding contact with individuals having active infections.

  • Educate on the signs and symptoms of both rejection and infection.

Questions to Guide Your Learning

  • Understand the specific drugs used for lung or kidney transplantation.

  • What are the fundamental principles underlying immunosuppression?

  • Define the nurse’s responsibilities in transplantation drug therapy, including interventions.

  • Identify opportunistic infections related to transplant medications and their treatments.

  • Differentiate among the transplant drugs discussed in the session.