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Pronunciation |
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(an
te THY moe site GLOB yu lin (RAB
bit) |
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Synonyms |
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Antithymocyte Immunoglobulin; ATG |
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Pharmacological Index |
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Immune Globulin |
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Use |
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Treatment of renal transplant acute rejection in conjunction with concomitant
immunosuppression |
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Contraindications |
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Patients with history of allergy or anaphylaxis to rabbit proteins, or who
have an acute viral illness |
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Warnings/Precautions |
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Infusion may produce fever and chills. To minimize, the first dose should be
infused over a minimum of 6 hours into a high-flow vein. Also, premedication
with corticosteroids, acetaminophen, and/or an antihistamine and/or slowing the
infusion rate may reduce reaction incidence and intensity.
Thymoglobulin® should only be used by physicians
experienced in immunosuppressive therapy for the treatment of renal transplant
patients. Medical surveillance is required during the infusion. In rare
circumstances, anaphylaxis has been reported with use. In such cases, the
infusion should be terminated immediately. Medical personnel should be available
to treat patients who experience anaphylaxis. Emergency treatment such as
0.3-0.5 mL aqueous epinephrine (1:1000 dilution) subcutaneously and other
resuscitative measures including oxygen, intravenous fluids, antihistamines,
corticosteroids, pressor amines, and airway management, as clinically indicated,
should be provided. Thymoglobulin® or other rabbit
immunoglobulins should not be administered again for such patients.
Thrombocytopenia or neutropenia may result from cross-reactive antibodies and is
reversible following dose adjustments. |
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Adverse
Reactions |
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>10%:
Central nervous system: Fever, chills, headache
Dermatologic: Rash
Endocrine & metabolic: Hyperkalemia
Gastrointestinal: Abdominal pain, diarrhea
Hematologic: Leukopenia, thrombocytopenia
Neuromuscular & skeletal: Weakness
Respiratory: Dyspnea
Miscellaneous: Systemic infection, pain
1% to 10%:
Gastrointestinal: Gastritis
Respiratory: Pneumonia
Miscellaneous: Sensitivity reactions: Anaphylaxis may be indicated by
hypotension, respiratory distress, serum sickness, viral infection
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Stability |
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Store intact vials under refrigeration (2°C to
8°C/36°F to
46°F); protect from light and do not freeze
Allow Thymoglobulin® and diluent (sterile WFI) to reach
room temperature before reconstituting the lyophilized product. Reconstitute
Thymoglobulin® with the supplied diluent, sterile water
for injection immediately before use. Thymoglobulin®
should be used within 4 hours of reconstitution if kept at room temperature.
Reconstitute each vial of Thymoglobulin® lyophilized
powder with 5 mL of sterile diluent to yield a concentration of 5 mg/mL of
Thymoglobulin®.
The calculated dosage of Thymoglobulin® should be
should be further diluted in 50-500 mL of 0.9% sodium chloride or 5% dextrose in
water. Each vial of Thymoglobulin® should be further
diluted to 50 mL of infusion solution. |
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Mechanism of
Action |
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May involve elimination of antigen-reactive T-lymphocytes (killer cells) in
peripheral blood or alteration of T-cell function |
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Pharmacodynamics/Kinetics |
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Half-life, plasma: 2-3 days |
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Usual Dosage |
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I.V.: 1.5 mg/kg/day for 7-14 days |
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Monitoring
Parameters |
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Lymphocyte profile, CBC with differential and platelet count, vital signs
during administration |
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Nursing
Implications |
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For I.V. use only; mild itching and erythema can be treated with
antihistamines; infuse first dose over at least 6 hours; any severe systemic
reaction to the skin test such as generalized rash, tachycardia, dyspnea,
hypotension, or anaphylaxis should preclude further therapy. Epinephrine and
resuscitative equipment should be nearby. Patient may need to be pretreated
with an antipyretic, antihistamine, and/or corticosteroid. |
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Dosage Forms |
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Injection: 25 mg vials (with
diluent) |
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