Skip to main content

Drug Interactions between etrasimod and smallpox and mpox vaccine

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

Edit list (add/remove drugs)

Interactions between your drugs

Moderate

smallpox and monkeypox vaccine etrasimod

Applies to: smallpox and mpox vaccine and etrasimod

MONITOR: Administration of the smallpox and monkeypox vaccine, which contains a live, attenuated, non-replicating strain of orthopoxvirus, to immunosuppressed patients is generally safe but may be associated with a diminished or suboptimal immunologic response due to antibody inhibition. Such patients 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: It is generally advisable to complete recommended vaccinations, including smallpox and monkeypox vaccine, before starting immunosuppressant or antineoplastic treatment. Clinicians should consult public health authorities and thoroughly assess risks versus benefits prior to administering the smallpox and monkeypox vaccine to immunosuppressed individuals. If the decision is made to vaccinate, titer testing by the Centers for Disease Control and Prevention (CDC) might be considered on a case-by-case basis. Because a correlate of protection has not been established and there is no known antibody titer level that will ensure protection, titer results should be interpreted with caution to avoid providing a false sense of security. Additionally, since immunosuppressed patients might be less likely to mount an effective vaccine response, infections may occur even after full vaccination and outcomes could be particularly severe in these patients, especially following exposure to more virulent orthopoxviruses. Therefore, vaccine recipients might consider avoiding high-risk exposures until after completion of immunosuppressive therapies. Regardless of vaccination status, all individuals who work with orthopoxviruses should wear appropriate personal protective equipment.

References (4)
  1. CDC Centers for Disease Control and Prevention (2019) General Best Practice Guidelines for Immunization: Altered Immunocompetence. https://www.cdc.gov/vaccines/hcp/acip-recs/general-recs/immunocompetence.pdf
  2. (2021) "Product Information. Jynneos (smallpox and monkeypox vaccine)." Bavarian Nordic, Inc.
  3. Rao AK, Petersen BW, Whitehill F, et al. (2022) "Use of JYNNEOS (Smallpox and Monkeypox Vaccine, Live, Nonreplicating) for Preexposure Vaccination of Persons at Risk for Occupational Exposure to Orthopoxviruses: Recommendations of the Advisory Committee on Immunization Practices--United States, 2022 ht"
  4. Anonymous. (2022) Updated ATAGI Clinical Guidance on Vaccination Against MPX (Monkeypox) https://www.health.gov.au/sites/default/files/documents/2022/08/atagi-clinical-guidance-on-vaccination-against-monkeypox.pdf

Drug and food interactions

Moderate

etrasimod food

Applies to: etrasimod

GENERALLY AVOID: Coadministration with moderate inhibitors of CYP450 3A4 such as grapefruit juice in patients who known or suspected to be poor CYP450 2C9 metabolizers may increase the exposure of etrasimod. Etrasimod is primarily metabolized by the isoenzymes CYP450 3A4, 2C8, and 2C9. Pharmacokinetic studies have reported that no single enzyme system appears to dominate the elimination pathway of etrasimod. Therefore, the involvement of multiple CYP450 isoforms reduces the likelihood of drug-drug interactions when only a single CYP450 isoform is strongly or moderately inhibited by a coadministered drug. In clinical drug interaction studies, when etrasimod was administered with the dual moderate CYP450 2C9 and 3A4 inhibitor fluconazole at steady-state levels, etrasimod systemic exposure (AUC) increased by 84%. However, concomitant use with the potent CYP450 3A4 inhibitor itraconazole increased the AUC of etrasimod by 32%, which was not considered by the manufacturer to be clinically significant. The effect on etrasimod systemic exposure in CYP450 2C9 intermediate metabolizers treated with less potent CYP450 3A4 inhibitors is not known. Increased plasma concentrations of etrasimod may increase the risk of infection, bradyarrhythmia, AV conduction delays, elevated transaminase levels, and macular edema.

MANAGEMENT: Until further information is available, the consumption of grapefruit and grapefruit juice in combination with moderate to potent CYP450 2C8 inhibitors such as gemfibrozil should be avoided or limited during treatment with etrasimod in patients who are poor CYP450 2C9 metabolizers. Caution is recommended with grapefruit products consumption in patients who are intermediate CYP450 2C9 metabolizers. Patients should be advised to notify their physician if they experience potential adverse effects of etrasimod.

References (6)
  1. (2023) "Product Information. Velsipity (etrasimod)." Pfizer U.S. Pharmaceuticals Group
  2. Lee C, Taylor C, Tang Y, Caballero LV, shan k, Randle A, Grundy JS (2022) Effects of fluconazole, gemfibrozil, and rifampin on the pharmacokinetics, safety, and tolerability of etrasimod https://gut.bmj.com/content/71/Suppl_1/A142.1
  3. (2024) "Product Information. Velsipity (etrasimod)." Pfizer Australia Pty Ltd, pfpvelst11024
  4. (2024) "Product Information. Velsipity (etrasimod)." Pfizer U.S. Pharmaceuticals Group
  5. (2024) "Product Information. Velsipity (etrasimod)." Pfizer Canada ULC
  6. Harnik S, Ungar B, Loebstein R, Ben-Horin S (2024) "A Gastroenterologist's guide to drug interactions of small molecules for inflammatory bowel disease" United European Gastroenterol J, 12, p. 627-637

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

Report options

Loading...
QR code containing a link to this page

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.

Medical Disclaimer