Interaction between Teriflunomide and Satralizumab
Major
Others
| ID | DDInter1771 and DDInter1644 |
| Interaction | Coadministration of leflunomide with other immuno- or myelosuppressive antirheumatic agents may potentiate the risk of infections. The risk is thought to extend to teriflunomide, its principal active metabolite, because recommended dosages of both result in a similar range of plasma concentrations of teriflunomide. Serious infections including sepsis, as well as opportunistic infections like Pneumocystis jiroveci pneumonia, pulmonary and extrapulmonary tuberculosis, and aspergillosis have been reported with the use of leflunomide, particularly in patients on concomitant hematotoxic therapy. |
| Management | Concomitant use of leflunomide with other immuno- or myelosuppressive antirheumatic agents should generally be avoided. When switching from leflunomide to one of these agents, consideration should be given to administering a washout procedure with cholestyramine or activated charcoal to accelerate elimination of leflunomide's active metabolite from plasma, which otherwise may take up to two years. This will decrease the overlap of systemic exposure to both compounds and reduce the likelihood of additive hematologic toxicities. However, the washout procedure may also induce disease worsening if the patient had been responding to leflunomide treatment. Patients who do not receive the washout procedure prior to switching should be monitored closely for hematologic toxicity. All patients treated with leflunomide or teriflunomide should be advised to contact their physician if they develop signs and symptoms of infection such as fever, chills, diarrhea, sore throat, muscle aches, shortness of breath, blood in phlegm, weight loss, red or inflamed skin, body sores, and pain or burning during urination. If evidence of serious infection or bone marrow suppression occurs, treatment should be stopped and washout procedure administered. |
| References | |
| Alternative for Teriflunomide |
L04A
More
|
| Alternative for Satralizumab | - |
Potential Metabolism Interactions
Substrate-Substrate Interaction：If more than one drug is metabolized by the same CYP, it is possible that its metabolism is inhibited because of the competition between the drugs. That means, it can be useful to lower the dosage of the drugs in the drug-cocktail because they remain longer in the organism than in monotherapy.
Inhibitor-Inhibitor Interaction：Combining two or more inhibitors of one CYP, should be compensated by lowering the dosage of these drugs because the metabolism is reduced and the drugs remain longer in the organism than in monotherapy. Not adapting the dosage bears the risk of even more side effects.
Inhibitor-Substrate Interaction：Combining drugs that have inhibitory effect and are substrates of one particular CYP, should be compensated by lowering the dosage. They rest longer in the organism than in monotherapy. Not adapting the dosage bears the risk of even more side effects.