Interactions : אינטראקציות

4.5   Interaction with other medicinal products and other forms of interaction
Enzymes of the protein catabolism are considered to be involved in the metabolism of ropeginterferon alfa-2b. The involvement of transport proteins in absorption, distribution and elimination of ropeginterferon alfa-2b is not known. Interferon alfa has shown to influence the activity of cytochrome P450 (CYP) isozymes CYP1A2 and CYP2D6.

No interaction studies have been performed with ropeginterferon alfa-2b.

Interaction studies of other pegylated interferon alfa medicinal products Co-administration of pegylated interferon alfa-2a with telbivudine in patients with hepatitis B increased the risk of developing peripheral neuropathy. A combination therapy with telbivudine and ropeginterferon alfa-2b is contraindicated (see section 4.3).

Administration of 180 micrograms of pegylated interferon alfa-2a once weekly for 4 weeks in healthy male subjects did not show any effect on mephenytoin, dapsone, debrisoquine and tolbutamide pharmacokinetics profiles, suggesting that pegylated interferon alfa-2a has no effect on in vivo metabolic activity of cytochrome P450 (CYP) 3A4, 2C9, 2C19 and 2D6 isozymes. In the same study, a 25% increase in the AUC of theophylline (CYP1A2 substrate) was observed, demonstrating that pegylated interferon alfa-2a is an inhibitor of CYP1A2 activity.

Co-administration of pegylated interferon alfa-2b showed no significant interaction with tolbutamide (CYP2C9 substrate), midazolam (CYP3A4 substrate), dapsone (N-acetyltransferase substrate) and modestly increased the exposure of caffeine (CYP1A2 substrate) and desipramine (CYP2D6 substrate).

Therefore, care should be taken when ropeginterferon alfa-2b is co-administered with CYP1A2 substrates notably those having a narrow therapeutic margin such as theophylline or methadone.
Likewise, caution is recommended with CYP2D6 substrates (e.g., vortioxetine, risperidone) combined with ropeginterferon alfa-2b. Ropeginterferon alfa-2b may inhibit the activity of CYP1A2 and CYP2D6 and thus may increase the blood concentrations of these medicinal products.

No dose adaptions for ropeginterferon alfa-2b should be necessary when concomitantly administered with medicinal products metabolised via CYP2C9/19, CYP3A4 or by N-acetyltransferase.

Caution must be exercised when administering ropeginterferon alfa-2b in combination with other potentially myelosuppressive/chemotherapeutic agents.
Narcotics, hypnotics or sedatives must be administered with caution when used concomitantly with ropeginterferon alfa-2b.