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Xermelo (telotristat) and Alcohol / Food Interactions

There are 2 alcohol/food/lifestyle interactions with Xermelo (telotristat) which include:


Nicotine ↔ telotristat ethyl

Moderate Drug Interaction

Consumer information for this interaction is not currently available.

MONITOR: Coadministration with telotristat ethyl may decrease the plasma concentrations of drugs that are substrates of CYP450 3A4 and/or 2B6 isoenzymes. The proposed mechanism is accelerated clearance due to induction of CYP450 3A4 and/or 2B6 (in vitro) isoenzymes by telotristat ethyl. When the probe CYP450 3A4 substrate midazolam (3 mg) was administered orally after 5 days of treatment with telotristat ethyl 500 mg three times daily (twice the recommended dosage), mean midazolam peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 25% and 48%, respectively, compared to administration of midazolam alone. The mean Cmax and AUC of the active metabolite, 1'-hydroxymidazolam, also decreased by 34% and 48%, respectively. This suggests induction by telotristat ethyl of the glucuronidation of 1'-hydroxymidazolam.

MANAGEMENT: When drugs that are known substrates of CYP450 3A4 and/or 2B6 are coadministered with telotristat ethyl, the possibility of a diminished therapeutic response to those drugs should be considered. Dosage adjustments as well as clinical and laboratory monitoring may be appropriate for some drugs, particularly those with a narrow therapeutic range, whenever telotristat ethyl is added to or withdrawn from therapy.


  1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  2. "Product Information. Xermelo (telotristat ethyl)." Lexicon Pharmaceuticals, Inc., The Woodlands, TX.

telotristat ethyl ↔ food

Moderate Food Interaction

Food increases the absorption of telotristat ethyl. To ensure adequate blood levels of the medication, telotristat ethyl should be administered with food or a meal.

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Xermelo (telotristat) drug Interactions

There are 389 drug interactions with Xermelo (telotristat)

Drug Interaction Classification

The classifications below are a general guideline only. It is difficult to determine the relevance of a particular drug interaction to any individual given the large number of variables.
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 information available.

Do not stop taking any medications without consulting your healthcare provider.

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