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Drug Interactions between Emflaza and Histoplasmin Diluted

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Moderate

histoplasmin deflazacort

Applies to: Histoplasmin Diluted (histoplasmin) and Emflaza (deflazacort)

MONITOR: Immunosuppressed patients may have diminished response to diagnostic skin test antigens due to suppression of cell-mediated, delayed-type hypersensitivity. Falsely insignificant or false-negative results may occur in such patients, which may include those who have recently received or are receiving immunosuppressive agents, antilymphocyte globulins, alkylating agents, antimetabolites, radiation, some antirheumatic agents, high dosages of corticosteroids or adrenocorticotropic agents (e.g., greater than or equal to 2 mg/kg/day or 20 mg/day of prednisone or equivalent for 14 consecutive days or more), or long-term topical or inhaled corticosteroids.

MANAGEMENT: Clinicians should be aware of the potential for falsely insignificant or false-negative results when administering diagnostic skin test antigens to patients treated with immunosuppressive agents.

References

  1. "Product Information. Candin (candida albicans extract)." Nielsen Biosciences Inc (2001):
  2. "Product Information. Histolyn-Cyl (histoplasmin)." ALK Laboratories Inc (2001):
  3. "Product Information. Spherulin (coccidioidin skin test)." ALK Laboratories Inc (2001):
  4. "Product Information. MSTA Mumps Skin Test Antigen (mumps skin test antigen)." Aventis Pharmaceuticals (2001):
  5. "Product Information. Multitest CMI (skin test antigens, multiple)." Aventis Pharmaceuticals (2001):
  6. "Product Information. Tuberculin Tine Test (tuberculin purified protein derivative)." Connaught Laboratories Inc
View all 6 references

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Drug and food interactions

Moderate

deflazacort food

Applies to: Emflaza (deflazacort)

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of 21-desdeflazacort, the active metabolite of deflazacort that is formed by esterases after oral administration and further metabolized by CYP450 3A4 to several inactive metabolites. The proposed mechanism is inhibition of CYP450 3A4-mediated metabolism in the gut wall by certain compounds present in grapefruit. In general, the effect of grapefruit juice is concentration-, dose- and preparation-dependent, and can vary widely among brands. Certain preparations of grapefruit juice (e.g., high dose, double strength) have sometimes demonstrated potent inhibition of CYP450 3A4, while other preparations (e.g., low dose, single strength) have typically demonstrated moderate inhibition. Increased systemic exposure to 21-desdeflazacort may increase the risk of corticosteroid adverse effects such as hypercorticism, hyperglycemia, adrenal suppression, immunosuppression, hypertension, salt and water retention, electrolyte abnormalities, behavioral and mood disturbances, posterior subcapsular cataracts, glaucoma, bone loss, and growth retardation in children and adolescents.

MANAGEMENT: Deflazacort should not be administered with grapefruit juice.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

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Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

See also

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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