Interaction between Dextrothyroxine and Sirolimus
Moderate Others

ID DDInter530 and DDInter1678
Interaction Higher dosages of lipid-lowering agents may be required during concomitant administration of sirolimus or temsirolimus. Dose-related serum lipid abnormalities, including but not limited to increased serum cholesterol and triglycerides, have been frequently reported in patients treated with sirolimus or temsirolimus.
Management Close clinical monitoring of serum cholesterol and triglycerides is recommended if sirolimus or temsirolimus is prescribed to patients receiving lipid-lowering agents. Modification of the antihyperlipidemic regimen or dosages may be necessary.
References
Alternative for Dextrothyroxine C10A
Alternative for Sirolimus S01X

L04A
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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.