What is Entereg: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Entereg overview

BRAND NAMES:

  • Entereg

Generic Names:

  • Entereg

Uses:

  • Helps restore bowel function after bowel surgery.

Therapeutic Classes:

  • Gastrointestinal Agent

Forms:

  • Capsule

How it’s taken:

  • By mouth

What is Entereg used for?

What form(s) does Entereg come in

  • Capsule

What are common Entereg doses?

  • Capsule 12MG

Common Entereg prescriptions

  • Entereg
    12mg capsule

How to take Entereg

  • A nurse or other trained health professional will give you this medicine.

  • This medicine is used only as part of a special program called Entereg® Access Support and Education (E.A.S.E.) in hospitalized patients. It is intended for short-term use only.

  • This medicine is used only as part of a special program called Entereg® Access Support and Education (E.A.S.E.) in hospitalized patients. It is intended for short-term use only.

  • A nurse or other trained health professional will give you this medicine.

What to do if you miss a dose of Entereg

Entereg contraindications

  • This medicine is not right for everyone. Do not take it if you had an allergic reaction to alvimopan, or if you used an opioid pain medicine within the past 7 days.

Entereg warnings

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, or blocked bowels.

  • Constipation, passing gas, or diarrhea

  • Decrease in how much or how often you urinate

  • Dry mouth, increased thirst, muscle cramps, nausea, vomiting, or upset stomach

  • Unusual bleeding, bruising, or weakness

Entereg interactions

  • Some medicines can affect how alvimopan works. Tell your doctor if you took an opioid pain medicine (such as codeine, fentanyl, methadone, or morphine) within the past week.

Entereg side effects

Serious Side Effects

  • Decrease in how much or how often you urinate

  • Unusual bleeding, bruising, or weakness

  • Constipation, passing gas, or diarrhea

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Dry mouth, increased thirst, muscle cramps, nausea, vomiting, or upset stomach

Less Serious Side Effects

  • Back pain