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Drug Interactions between avacopan and roflumilast

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

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Interactions between your drugs

Moderate

roflumilast avacopan

Applies to: roflumilast and avacopan

GENERALLY AVOID: The concomitant use of roflumilast with immunosuppressive agents has not been adequately studied. Roflumilast is a selective phosphodiesterase 4 (PDE4) inhibitor and a nonsteroidal anti-inflammatory agent. In experimental models and in vitro studies, roflumilast has exhibited immunomodulatory effects. Specifically, roflumilast and its active metabolite, roflumilast N-oxide, suppress the release of inflammatory mediators including leukotriene B4, reactive oxygen species, tumor necrosis factor alpha, interferon gamma, and granzyme B. Roflumilast also reduces sputum neutrophils and attenuates influx of neutrophils and eosinophils into the airways.

MANAGEMENT: According to the product labeling for roflumilast in some countries such as Canada and the U.K., concomitant use with immunosuppressive agents such as methotrexate, azathioprine, infliximab, etanercept, and systemic corticosteroids (except when used short-term, e.g., in the treatment of COPD exacerbations) should be avoided if possible. Due to a lack of clinical experience, treatment with roflumilast should not be initiated, or existing treatment should be stopped, in patients receiving immunosuppressive agents and in patients with severe acute infectious diseases, cancers (except basal cell carcinoma), or severe immunological diseases (e.g., HIV infection, multiple sclerosis, lupus erythematosus, progressive multifocal leukoencephalopathy).

References (2)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2011) "Product Information. Daxas (roflumilast)." Nycomed Inc

Drug and food interactions

Moderate

avacopan food

Applies to: avacopan

ADJUST DOSING INTERVAL: Food significantly enhances the oral bioavailability of avacopan. When a 30 mg capsule of avacopan was administered with a high-fat, high-calorie meal, avacopan peak plasma concentration (Cmax) and systemic exposure (AUC) increased by approximately 8% and 72%, respectively, while the time to reach peak concentration (Tmax) was delayed by approximately 4 hours (from 2.0 hours to 6.0 hours).

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of avacopan. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruit. Inhibition of hepatic CYP450 3A4 may also contribute. The interaction has not been studied with grapefruit juice, but has been reported for itraconazole, a potent CYP450 3A4 inhibitor. When avacopan was administered with itraconazole (200 mg once daily for 4 days), avacopan peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 1.9-fold and 2.2-fold, respectively. 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. Increased exposure to avacopan may increase the risk and/or severity of serious adverse reactions such as hepatotoxicity and infections.

MANAGEMENT: To ensure maximal oral absorption, avacopan should be administered with food. Patients should preferably avoid or limit consumption of grapefruit, grapefruit juice, or any supplement containing grapefruit extract during avacopan therapy.

References (2)
  1. (2021) "Product Information. Tavneos (avacopan)." ChemoCentryx, Inc.
  2. (2023) "Product Information. Tavneos (avacopan)." Vifor Fresenius Medical Care Renal Pharma UK Ltd
Minor

roflumilast food

Applies to: roflumilast

Food intake does not affect the total exposure to roflumilast and its pharmacologically active N-oxide metabolite, but delays the time to maximum concentration (Tmax) of roflumilast by one hour and reduces its peak plasma concentration (Cmax) by approximately 40%. The Tmax and Cmax of
roflumilast N-oxide are unaffected. Roflumilast may be taken with or without food.

References (3)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2011) "Product Information. Daxas (roflumilast)." Nycomed Inc
  3. (2011) "Product Information. Daliresp (roflumilast)." Astra-Zeneca Pharmaceuticals

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

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