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Drug Interactions between atidarsagene autotemcel and emtricitabine / rilpivirine / tenofovir alafenamide

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

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Interactions between your drugs

Major

tenofovir atidarsagene autotemcel

Applies to: emtricitabine / rilpivirine / tenofovir alafenamide and atidarsagene autotemcel

ADJUST DOSING INTERVAL: Antiretroviral medications may interfere with the manufacturing of apheresed cells used for autologous gene therapy that undergo transduction by a lentiviral vector (LVV) (e.g., atidarsagene autotemcel, betibeglogene autotemcel, elivaldogene autotemcel, lovotibeglogene autotemcel). Following hematopoietic stem cell (HSC) mobilization and apheresis, CD34+ cells are genetically modified with a replication-incompetent, self-inactivating LVV carrying functional copies of deoxyribonucleic acid (DNA). Lentiviruses are retroviruses which possess short spans of genetic information identical to that of the human immunodeficiency virus (HIV) and may therefore be susceptible to inactivation by antiretroviral medications. Clinical data examining the use of antiretroviral medication(s) during the mobilization and apheresis process are not available.

MANAGEMENT: Antiretroviral medications should be avoided for at least one month, or the expected duration of elimination of the antiretroviral medication, prior to HSC mobilization and until all cycles of apheresis have been completed. Some manufacturers of atidarsagene autotemcel suggest continuing to avoid antiretroviral medications for at least 7 days after its infusion. If antiretroviral therapy is being considered for HIV or human T-lymphotropic virus (HTLV) prophylaxis, serology testing should be conducted to rule out infection before initiating mobilization and apheresis. Delaying gene therapy treatment until an HIV/HTLV western blot and viral load assay have been performed at 6-months postexposure may be appropriate. In addition, after the administration of autologous gene therapies that undergo the LVV transduction process, use of non-polymerase chain reaction (PCR)-based assays are recommended when screening for HIV, due to the risk of a false positive result with PCR-based assays.

References

  1. (2022) "Product Information. Zynteglo (betibeglogene autotemcel)." bluebird bio
  2. (2022) "Product Information. Skysona (elivaldogene autotemcel)." bluebird bio
  3. (2023) "Product Information. Lyfgenia (lovotibeglogene autotemcel)." bluebird bio
  4. (2024) "Product Information. Lenmeldy (atidarsagene autotemcel)." Orchard Therapeutics
View all 4 references

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Major

emtricitabine atidarsagene autotemcel

Applies to: emtricitabine / rilpivirine / tenofovir alafenamide and atidarsagene autotemcel

ADJUST DOSING INTERVAL: Antiretroviral medications may interfere with the manufacturing of apheresed cells used for autologous gene therapy that undergo transduction by a lentiviral vector (LVV) (e.g., atidarsagene autotemcel, betibeglogene autotemcel, elivaldogene autotemcel, lovotibeglogene autotemcel). Following hematopoietic stem cell (HSC) mobilization and apheresis, CD34+ cells are genetically modified with a replication-incompetent, self-inactivating LVV carrying functional copies of deoxyribonucleic acid (DNA). Lentiviruses are retroviruses which possess short spans of genetic information identical to that of the human immunodeficiency virus (HIV) and may therefore be susceptible to inactivation by antiretroviral medications. Clinical data examining the use of antiretroviral medication(s) during the mobilization and apheresis process are not available.

MANAGEMENT: Antiretroviral medications should be avoided for at least one month, or the expected duration of elimination of the antiretroviral medication, prior to HSC mobilization and until all cycles of apheresis have been completed. Some manufacturers of atidarsagene autotemcel suggest continuing to avoid antiretroviral medications for at least 7 days after its infusion. If antiretroviral therapy is being considered for HIV or human T-lymphotropic virus (HTLV) prophylaxis, serology testing should be conducted to rule out infection before initiating mobilization and apheresis. Delaying gene therapy treatment until an HIV/HTLV western blot and viral load assay have been performed at 6-months postexposure may be appropriate. In addition, after the administration of autologous gene therapies that undergo the LVV transduction process, use of non-polymerase chain reaction (PCR)-based assays are recommended when screening for HIV, due to the risk of a false positive result with PCR-based assays.

References

  1. (2022) "Product Information. Zynteglo (betibeglogene autotemcel)." bluebird bio
  2. (2022) "Product Information. Skysona (elivaldogene autotemcel)." bluebird bio
  3. (2023) "Product Information. Lyfgenia (lovotibeglogene autotemcel)." bluebird bio
  4. (2024) "Product Information. Lenmeldy (atidarsagene autotemcel)." Orchard Therapeutics
View all 4 references

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Major

rilpivirine atidarsagene autotemcel

Applies to: emtricitabine / rilpivirine / tenofovir alafenamide and atidarsagene autotemcel

ADJUST DOSING INTERVAL: Antiretroviral medications may interfere with the manufacturing of apheresed cells used for autologous gene therapy that undergo transduction by a lentiviral vector (LVV) (e.g., atidarsagene autotemcel, betibeglogene autotemcel, elivaldogene autotemcel, lovotibeglogene autotemcel). Following hematopoietic stem cell (HSC) mobilization and apheresis, CD34+ cells are genetically modified with a replication-incompetent, self-inactivating LVV carrying functional copies of deoxyribonucleic acid (DNA). Lentiviruses are retroviruses which possess short spans of genetic information identical to that of the human immunodeficiency virus (HIV) and may therefore be susceptible to inactivation by antiretroviral medications. Clinical data examining the use of antiretroviral medication(s) during the mobilization and apheresis process are not available.

MANAGEMENT: Antiretroviral medications should be avoided for at least one month, or the expected duration of elimination of the antiretroviral medication, prior to HSC mobilization and until all cycles of apheresis have been completed. Some manufacturers of atidarsagene autotemcel suggest continuing to avoid antiretroviral medications for at least 7 days after its infusion. If antiretroviral therapy is being considered for HIV or human T-lymphotropic virus (HTLV) prophylaxis, serology testing should be conducted to rule out infection before initiating mobilization and apheresis. Delaying gene therapy treatment until an HIV/HTLV western blot and viral load assay have been performed at 6-months postexposure may be appropriate. In addition, after the administration of autologous gene therapies that undergo the LVV transduction process, use of non-polymerase chain reaction (PCR)-based assays are recommended when screening for HIV, due to the risk of a false positive result with PCR-based assays.

References

  1. (2022) "Product Information. Zynteglo (betibeglogene autotemcel)." bluebird bio
  2. (2022) "Product Information. Skysona (elivaldogene autotemcel)." bluebird bio
  3. (2023) "Product Information. Lyfgenia (lovotibeglogene autotemcel)." bluebird bio
  4. (2024) "Product Information. Lenmeldy (atidarsagene autotemcel)." Orchard Therapeutics
View all 4 references

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Drug and food interactions

Moderate

rilpivirine food

Applies to: emtricitabine / rilpivirine / tenofovir alafenamide

GENERALLY AVOID: Coadministration with grapefruit or grapefruit juice may increase the plasma concentrations of rilpivirine. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall induced by certain compounds present in grapefruit. In 15 study subjects given rilpivirine (150 mg once daily) with the potent CYP450 3A4 inhibitor ketoconazole (400 mg once daily), mean rilpivirine peak plasma concentration (Cmax), systemic exposure (AUC) and trough plasma concentration (Cmin) were increased by 30%, 49% and 76%, respectively. In 16 study subjects given a single 500 mg dose of a less potent CYP450 3A4 inhibitor chlorzoxazone two hours after rilpivirine (150 mg once daily), mean rilpivirine Cmax, AUC, and Cmin were increased by 17%, 25%, and 18%, respectively. Because grapefruit juice inhibits primarily intestinal rather than hepatic CYP450 3A4, the magnitude of interaction is greatest for those drugs that undergo significant presystemic metabolism by CYP450 3A4 (i.e., drugs with low oral bioavailability). 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. Pharmacokinetic interactions involving grapefruit juice are also subject to a high degree of interpatient variability, thus the extent to which a given patient may be affected is difficult to predict.

ADJUST DOSING INTERVAL: The administration of rilpivirine in a fasting state may decrease its oral absorption. Under fasted conditions, the systemic exposure to rilpivirine was 40% lower compared to normal or high-fat caloric meals (533 to 928 Kcal). The systemic exposure was 50% lower when rilpivirine was taken with a protein-rich nutritional beverage.

MANAGEMENT: Coadministration of grapefruit or grapefruit juice with rilpivirine should preferably be avoided. For optimal absorption, it is recommended to take rilpivirine on a regular schedule with a meal.

References

  1. (2011) "Product Information. Edurant (rilpivirine)." Tibotec Pharmaceuticals
  2. Cerner Multum, Inc. (2015) "Canadian Product Information."

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Minor

tenofovir food

Applies to: emtricitabine / rilpivirine / tenofovir alafenamide

Food enhances the oral absorption and bioavailability of tenofovir, the active entity of tenofovir disoproxil fumarate. According to the product labeling, administration of the drug following a high-fat meal increased the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of tenofovir by approximately 14% and 40%, respectively, compared to administration in the fasting state. However, administration with a light meal did not significantly affect the pharmacokinetics of tenofovir compared to administration in the fasting state. Food delays the time to reach tenofovir Cmax by approximately 1 hour. Tenofovir disoproxil fumarate may be administered without regard to meals.

References

  1. (2001) "Product Information. Viread (tenofovir)." Gilead Sciences

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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.


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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.