Coccidioides Immitis Spherule-derived Skin Test Antigen
Generic Name: coccidioides immitis spherule-derived skin test antigen
Brand Names:
Spherusol
11 DESCRIPTION Spherusol ® is a sterile aqueous solution of extracts of C. immitis spherules. The multi-dose vial contains 0.9% sodium chloride and 0.014% sodium borate with 0.4% phenol as a preservative. Residual thimerosal from the manufacturing process is present at a concentration of ≤0.0001% (<0.05 mcg mercury/0.1 mL dose). Each 0.1 mL dose contains 1.27 mcg of spherule-derived antigen. The potency of each lot of Spherusol ® is determined in sensitized guinea pigs.
Overview
11 DESCRIPTION Spherusol ® is a sterile aqueous solution of extracts of C. immitis spherules. The multi-dose vial contains 0.9% sodium chloride and 0.014% sodium borate with 0.4% phenol as a preservative. Residual thimerosal from the manufacturing process is present at a concentration of ≤0.0001% (<0.05 mcg mercury/0.1 mL dose). Each 0.1 mL dose contains 1.27 mcg of spherule-derived antigen. The potency of each lot of Spherusol ® is determined in sensitized guinea pigs.
Uses
1 INDICATIONS AND USAGE Spherusol ® is a skin test antigen indicated for the detection of delayed-type hypersensitivity to Coccidioides immitis in individuals with a history of pulmonary coccidioidomycosis. Spherusol ® is approved for use in individuals 18-64 years of age. The use of Spherusol ® to detect delayed-type hypersensitivity responses in a general population with unknown exposure to C. immitis has not been evaluated. Persons with acute or disseminated coccidioidomycosis may not develop a delayed-type hypersensitivity response to Spherusol ® . Persons with immunodeficiency and a history of coccidioidomycosis may not develop a delayed-type hypersensitivity response to Spherusol ® .
Dosage
2 DOSAGE AND ADMINISTRATION A single 0.1 mL intradermal injection. Induration at injection site to be evaluated 48 hours after administration. ( 2.1 , 2.3 ) 2.1 Preparation for Administration Spherusol ® is a clear, colorless sterile solution for intradermal administration. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. If any of these conditions exists, the skin test antigen should not be administered. 2.2 Administration: Spherusol ® is administered as a 0.1 mL dose by intradermal injection to the volar surface of the forearm using a tuberculin syringe (0.5 or 1.0 mL) and a ½ inch 26-27 gauge needle.
Side Effects
6 ADVERSE REACTIONS The most commonly reported local adverse reactions were itching and swelling (>75%) and pain (>15%) within 7 days of administration.( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Nielsen Biosciences, Inc. at (855) 855-1212 or Food and Drug Administration (FDA) at 1-800-332-1088 or www.vaers.hhs.gov . ( 6.3 ) 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a skin test antigen cannot be directly compared to rates in the clinical trials of another skin test antigen, and may not reflect the rates observed in practice.
Interactions
7 DRUG INTERACTIONS Corticosteroids and immunosuppressive agents may suppress the response to the skin test.( 7.1 ) 7.1 Corticosteroids and Immunosuppressives Corticosteroids and Immunosuppressive agents may suppress the response to the skin test. Pharmacologic doses of corticosteroids may suppress the response to skin test antigens after two weeks of therapy. The mechanism of suppression is thought to involve a decrease in monocytes and lymphocytes, particularly T-cells. The normal DTH response usually returns to pre-treatment levels within several weeks after steroid therapy is discontinued. (5) The use of Spherusol ® has not been evaluated during or following the use of corticosteroids or immunosuppressive agents.
Warnings
WARNING The expected response to Spherusol ® is a local area of inflammation at the site of the skin test. The reaction is usually dime to quarter size reaching maximum diameter between 24 and 48 hours. Larger accelerated reactions can occur, which may require treatment with local cold compresses and anti-inflammatory medication. ( 2.3 , 6.1 ) Systemic reactions can occur with skin test antigens and in certain individuals these reactions may be life-threatening or cause death. 5 WARNINGS AND PRECAUTIONS Acute hypersensitivity reactions and anaphylaxis have occurred following the administration of other skin test antigens and may occur in individuals following the administration of Spherusol ® . ( 5.1 ) Patients receiving beta-blocking drugs may be refractive to the usual dose of epinephrine in cases of hypersensitivity. ( 5.2 ) Any condition or agent that impairs or attenuates delayed type hypersensitivity reactions, including infections and use of immunosuppressive drugs, can potentially cause a false negative reaction to Spherusol ® . 4 CONTRAINDICATIONS A severe allergic reaction (e.g., anaphylaxis) to Spherusol ® , or any component of Spherusol ® or other coccidioidin products is a contraindication to administration. Severe allergic reaction (e.g., anaphylaxis) to Spherusol ® , or any component of Spherusol ® or other coccidioidin products. ( 4 )
Pregnancy
8.1 Pregnancy The safety and effectiveness of Spherusol ® in pregnant women have not been established. Pregnancy Category C Animal reproduction studies have not been conducted with Spherusol ® . It is also not known whether Spherusol ® can cause fetal harm when administered to a pregnant woman or affect reproduction capacity. Spherusol ® should be given to a pregnant woman only if clearly needed.
Storage
16 HOW SUPPLIED/STORAGE AND HANDLING Spherusol ® is available in 1 mL multidose vial. NDC# 59584-140-01: multi-dose vial. Store refrigerated at 2° to 8°C (35° to 46°F). Do not freeze. Discard if frozen. Do not use after expiration date.
Frequently Asked Questions
What is Coccidioides Immitis Spherule-derived Skin Test Antigen used for?▼
1 INDICATIONS AND USAGE Spherusol ® is a skin test antigen indicated for the detection of delayed-type hypersensitivity to Coccidioides immitis in individuals with a history of pulmonary coccidioidomycosis. Spherusol ® is approved for use in individuals 18-64 years of age. The use of Spherusol ® to detect delayed-type hypersensitivity responses in a general population with unknown exposure to C. immitis has not been evaluated. Persons with acute or disseminated coccidioidomycosis may not develop a delayed-type hypersensitivity response to Spherusol ® . Persons with immunodeficiency and a history of coccidioidomycosis may not develop a delayed-type hypersensitivity response to Spherusol ® .
What are the side effects of Coccidioides Immitis Spherule-derived Skin Test Antigen?▼
6 ADVERSE REACTIONS The most commonly reported local adverse reactions were itching and swelling (>75%) and pain (>15%) within 7 days of administration.( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Nielsen Biosciences, Inc. at (855) 855-1212 or Food and Drug Administration (FDA) at 1-800-332-1088 or www.vaers.hhs.gov . ( 6.3 ) 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a skin test antigen cannot be directly compared to rates in the clinical trials of another skin test antigen, and may not reflect the rates observed in practice.
Can I take Coccidioides Immitis Spherule-derived Skin Test Antigen during pregnancy?▼
8.1 Pregnancy The safety and effectiveness of Spherusol ® in pregnant women have not been established. Pregnancy Category C Animal reproduction studies have not been conducted with Spherusol ® . It is also not known whether Spherusol ® can cause fetal harm when administered to a pregnant woman or affect reproduction capacity. Spherusol ® should be given to a pregnant woman only if clearly needed.
What are the important warnings for Coccidioides Immitis Spherule-derived Skin Test Antigen?▼
WARNING The expected response to Spherusol ® is a local area of inflammation at the site of the skin test. The reaction is usually dime to quarter size reaching maximum diameter between 24 and 48 hours. Larger accelerated reactions can occur, which may require treatment with local cold compresses and anti-inflammatory medication. ( 2.3 , 6.1 ) Systemic reactions can occur with skin test antigens and in certain individuals these reactions may be life-threatening or cause death. 5 WARNINGS AND PRECAUTIONS Acute hypersensitivity reactions and anaphylaxis have occurred following the administration of other skin test antigens and may occur in individuals following the administration of Spherusol ® . ( 5.1 ) Patients receiving beta-blocking drugs may be refractive to the usual dose of epinephrine in cases of hypersensitivity. ( 5.2 ) Any condition or agent that impairs or attenuates delayed type hypersensitivity reactions, including infections and use of immunosuppressive drugs, can potentially cause a false negative reaction to Spherusol ® . 4 CONTRAINDICATIONS A severe allergic reaction (e.g., anaphylaxis) to Spherusol ® , or any component of Spherusol ® or other coccidioidin products is a contraindication to administration. Severe allergic reaction (e.g., anaphylaxis) to Spherusol ® , or any component of Spherusol ® or other coccidioidin products. ( 4 )
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Medical Disclaimer
This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.