Atropine/diphenoxylate

Diphenoxylate/atropine, also known as co-phenotrope, is a combination of the medications diphenoxylate and atropine, used to treat diarrhea. It should not be used in those in whom Clostridioides difficile infection is a concern. It is taken by mouth. Onset is typically within an hour.

Atropine/diphenoxylate
Combination of
DiphenoxylateMu opiate receptor agonist
AtropineMuscarinic acetylcholine receptors antagonist
Clinical data
Trade namesLomotil
AHFS/Drugs.comProfessional Drug Facts
License data
Pregnancy
category
  • AU: C
Routes of
administration
By mouth
ATC code
  • None
Legal status
Legal status
Identifiers
CAS Number
PubChem CID
ChemSpider
  • none
KEGG
ChEBI
  (verify)

Side effects may include abdominal pain, angioedema, glaucoma, heart problems, feeling tired, dry mouth, and trouble seeing. It is unclear if use in pregnancy is safe and use when breastfeeding may result in side effects in the baby. It works by decreasing contractions of the bowel.

The combination was approved for medical use in the United States in 1960. It is available as a generic medication. In 2021, it was the 293rd most commonly prescribed medication in the United States, with more than 600,000 prescriptions. It is sold under the brand name Lomotil among others. The medication is in Schedule V in the United States.

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