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Drug Interactions between ella and Technivie

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

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Interactions between your drugs

Major

ritonavir ulipristal

Applies to: Technivie (ombitasvir / paritaprevir / ritonavir) and ella (ulipristal)

GENERALLY AVOID: Coadministration with potent and moderate inducers of CYP450 3A4 may significantly decrease the plasma concentrations of ulipristal acetate and its pharmacologically active metabolite. Based on in vitro and pharmacokinetic data, ulipristal acetate is thought to be primarily metabolized by CYP450 3A4 to mono-demethylated and di-demethylated metabolites. When a single 30 mg dose of ulipristal acetate was administered following a 9-day treatment with 600 mg once daily of rifampin, a potent CYP450 3A4 inducer, ulipristal acetate peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 90% and 93% respectively, while half-life decreased by 2.2-fold. The Cmax and AUC of monodemethyl-ulipristal acetate, the active metabolite, decreased by 84% and 90%, respectively. The interaction has not been studied with other, less potent inducers.

MANAGEMENT: Concomitant use of ulipristal acetate with potent and moderate CYP450 3A4 inducers should generally be avoided due to the potential for loss of therapeutic efficacy. For patients who have used enzyme-inducing drugs within the past 4 weeks and are seeking emergency contraception, ulipristal acetate is not recommended and a non-hormonal method (i.e. a copper intrauterine device (Cu-IUD)) should be considered.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. Cerner Multum, Inc. "Australian Product Information."
  3. (2022) "Product Information. Ella (ulipristal)." Afaxys Inc.
  4. Cerner Multum, Inc. (2015) "Canadian Product Information."
  5. (2021) "Product Information. Esmya (ulipristal)." Gedeon Richter (UK) Ltd
  6. (2021) "Product Information. EllaOne (ulipristal)." HRA Pharma UK & Ireland Ltd
View all 6 references

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Drug and food interactions

Moderate

ritonavir food

Applies to: Technivie (ombitasvir / paritaprevir / ritonavir)

ADJUST DOSING INTERVAL: Administration with food may modestly affect the bioavailability of ritonavir from the various available formulations. When the oral solution was given under nonfasting conditions, peak ritonavir concentrations decreased 23% and the extent of absorption decreased 7% relative to fasting conditions. Dilution of the oral solution (within one hour of dosing) with 240 mL of chocolate milk or a nutritional supplement (Advera or Ensure) did not significantly affect the extent and rate of ritonavir absorption. When a single 100 mg dose of the tablet was administered with a high-fat meal (907 kcal; 52% fat, 15% protein, 33% carbohydrates), approximately 20% decreases in mean peak concentration (Cmax) and systemic exposure (AUC) were observed relative to administration after fasting. Similar decreases in Cmax and AUC were reported when the tablet was administered with a moderate-fat meal. In contrast, the extent of absorption of ritonavir from the soft gelatin capsule formulation was 13% higher when administered with a meal (615 KCal; 14.5% fat, 9% protein, and 76% carbohydrate) relative to fasting.

MANAGEMENT: Ritonavir should be taken with meals to enhance gastrointestinal tolerability.

References

  1. (2001) "Product Information. Norvir (ritonavir)." Abbott Pharmaceutical

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Moderate

paritaprevir food

Applies to: Technivie (ombitasvir / paritaprevir / ritonavir)

ADJUST DOSING INTERVAL: Food enhances the oral bioavailability of ombitasvir, paritaprevir, ritonavir, and dasabuvir. Relative to fasting conditions, administration of ombitasvir, paritaprevir, ritonavir, and dasabuvir with a moderate-fat meal (approximately 600 Kcal; 20% to 30% calories from fat) increased the mean systemic exposure (AUC) by 82%, 211%, 49%, and 30%, respectively. Relative to fasting conditions, administration of ombitasvir, paritaprevir, ritonavir, and dasabuvir with a high-fat meal (approximately 900 Kcal; with 60% calories from fat) increased the mean AUC by 76%, 180%, 44%, and 22%, respectively.

MANAGEMENT: Ombitasvir/paritaprevir/ritonavir plus dasabuvir should always be administered with a meal. The fat or calorie content does not matter.

References

  1. (2022) "Product Information. Viekira Pak (dasabuvir/ombitasvir/paritaprev/ritonav)." AbbVie US LLC

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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

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