Therapeutic Drug Monitoring

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Anser® Ordering Logistics

Ordering Anser is simple. The first step is to download the current test requisition and fill it out completely for your patient.

Why use therapeutic drug monitoring during the transition from IV- to SC-IFX?
  • Gain important data to help optimize your patient’s treatment journey
  • Before switching, assess IV‑IFX trough concentrations and antibodies to evaluate response and stability
  • Post-transition to SC-IFX, confirm adequate exposure and establish an IFX-SC baseline
  • Consider therapeutic adjustments in conjunction with clinical presentation for durable drug response
Sample Anser IFX test report for Celltrion Testing Access Program

Specimen Collection & Shipping Instructions

Please see the back of the test requisition for more information.

Turnaround Time: 3 business days from date of receipt
Transport Requirements: Ambient or refrigerated cold pack (do not freeze)
Specimen Type & Volume: 2.0 mL serum
Specimen Collection Tube: SST or Red Top Tube
Specimen Stability: 14 days room temperature or 14 days refrigerated

Anser is part of the Prometheus continuum of care for IBD patients

IBD Precis - Identify, differentiate and risk stratisfy IBD phenotype
Respondr TNF - Indicate likelihood of response and stratify risk
Anser - Therapeutic drug monitoring for IFX, ADA, RZB, VDZ and UST

Anser tests are laboratory-developed tests that were developed, and analytically and clinically validated by Prometheus Laboratories Inc. under federal Clinical Laboratory Improvement Amendments (CLIA) guidelines, and are performed exclusively in our high complexity CLIA-certified (05D0917432) and College of American Pathologists-accredited (6805501) clinical laboratory. As laboratory a developed tests, they have not been cleared or approved by the US FDA. These tests may be covered by one or more US pending or issued patents – see prometheuslabs.com/patents. This material is provided for general information purposes only as an educational service for healthcare physicians and their patients. It is not intended as a substitute for medical advice and/or consultation with a physician.