Iodoquinol (diiodohydroxyquin diiodohydroxyquinoline)

Iodoquinol Brand Names- Diodoquin | Yodoxin

What is Iodoquinol (diiodohydroxyquin diiodohydroxyquinoline)

Iodoquinol (diiodohydroxyquin diiodohydroxyquinoline) is an oral amebicide used to treat patients infected with protozoa, especially Entamoeba histolytica. Iodoquinol is effective in killing intraluminal parasites in asymptomatic cyst passers and symptomatic patients, and can be used alone in mild cases or in asymptomatic carriers (noninvasive or luminal amebiasis).

In more severe cases, iodoquinol should be used after systemically absorbed amebicide therapy (e.g., metronidazole) is completed. 

Entamoeba histolytica is not endemic in the United States, but travelers to high-risk areas where amebiasis is endemic may acquire the infection during their travel. The incidence of amebiasis has increased in the southwestern United States most likely due to emigration from Mexico.

Iodoquinol may also have some antibacterial and antifungal properties. However, due to the potential for serious side effects with longer durations of use, controversies exist concerning iodoquinol for off-label uses such as the treatment of Blastocystis hominis infection, pulmonary aspergillosis, and acrodermatitis enteropathica (a rare, potentially fatal inherited zinc deficiency disorder).

Iodoquinol has also been applied topically treat dermatitis and skin infections

The FDA approved iodoquinol in 1953.

Indications

  1. amebiasis
  2. aspergillosis
  3. Balantidium coli
  4. Blastocystis hominis
  5. Dientamoeba fragilis
  6. Entamoeba histolytica
  7. zinc deficiency

Side Effects

  1. abdominal pain
  2. acneiform rash
  3. bullous rash
  4. chills
  5. diarrhea
  6. fever
  7. goiter
  8. hair discoloration
  9. headache
  10. hyperthyroidism
  11. hypothyroidism
  12. iododerma
  13. nail discoloration
  14. nausea
  15. optic atrophy
  16. optic neuritis
  17. peripheral neuropathy
  18. pruritus
  19. pruritus ani
  20. seizures
  21. skin discoloration
  22. urticaria
  23. vertigo
  24. vomiting

Monitoring Parameters

  • ophthalmologic exam
  • stool exam
  • thyroid function tests (TFTs)

Contraindications

  • breast-feeding
  • diarrhea
  • geriatric
  • goiter
  • Graves’ disease
  • hepatic disease
  • hyperthyroidism
  • hypothyroidism
  • infants
  • iodine hypersensitivity
  • iodoquinol hypersensitivity
  • optic neuritis
  • peripheral neuropathy
  • pregnancy
  • primaquine hypersensitivity
  • renal disease
  • renal impairment
  • thyroid disease
  • visual disturbance

Interactions

  • Bortezomib
  • Iodine; Potassium Iodide, KI
  • Methimazole
  • Potassium Iodide, KI
  • Propylthiouracil, PTU
  • Thyroid hormones
  • Zalcitabine, ddC
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