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Iodoquinol, Oral eye-oh-doh-KWIN-ole

What are other names for this medicine?

Type of medicine: antiprotozoal (treats infections caused by protozoa)

Generic and brand names: diiodohydroxyquin, oral; iodoquinol, oral; Yodoxin

What is this medicine used for?

This medicine is taken by mouth to treat infections of the intestinal tract.

What should my healthcare provider know before I take this medicine?

Before taking this medicine, tell your healthcare provider if you have ever had:

  • an allergic reaction to iodine or any other medicine
  • eye problems such as optic neuritis
  • liver problems
  • nerve problems
  • thyroid disease

Females of childbearing age: Tell your healthcare provider if you are pregnant or plan to become pregnant. It is not known whether this medicine will harm an unborn baby. Do not breast-feed while taking this medicine without your healthcare provider's approval.

How do I take it?

Check the label on the medicine for directions about your specific dose. Take this medicine exactly as your healthcare provider prescribes. Do not take more or less or take it longer than prescribed. Taking too much or taking this medicine for too long may cause eye problems. Do not stop taking this medicine without your healthcare provider's approval, even if you feel well.

Take this medicine right after meals to lessen stomach upset.

What if I miss a dose?

If you miss a dose, take it as soon as you remember unless it is almost time for the next scheduled dose. In that case, skip the missed dose and take the next one as directed. Do not take double doses. If you are not sure of what to do if you miss a dose, or if you miss more than one dose, contact your healthcare provider.

What if I overdose?

Symptoms of an acute overdose have not been reported.

What should I watch out for?

Contact your healthcare provider if your condition does not improve or gets worse.

You may need to have regular blood tests while taking this medicine.

This medicine may cause dizziness or vision problems. Do not drive or operate machinery until you know how this medicine affects you. If you take this medicine for a long time, you need to have regular eye exams.

If you need emergency care, surgery, or dental work, tell the healthcare provider or dentist you are taking this medicine. This medicine may interfere with the results of thyroid function tests for as long as 6 months after you stop taking this medicine. Be sure to tell your healthcare provider that you are taking this medicine before any thyroid tests.

What are the possible side effects?

Along with its needed effects, your medicine may cause some unwanted side effects. Some side effects may be very serious. Some side effects may go away as your body adjusts to the medicine. Tell your healthcare provider if you have any side effects that continue or get worse.

Life-threatening (Report these to your healthcare provider right away. If you cannot reach your healthcare provider right away, get emergency medical care or call 911 for help): Allergic reaction (hives; itching; rash; trouble breathing; chest pain or tightness in your chest; swelling of your lips, tongue, and throat).

Serious (report these to your healthcare provider right away): Skin rash; severe itching; fever and chills; blurred vision or other vision problems; numbness or tingling in hands or feet.

Other: Diarrhea, nausea, vomiting, stomach cramps, dizziness, headache, rectal itching.

What products might interact with this medicine?

When you take this medicine with other medicines, it can change the way this or any of the other medicines work. Nonprescription medicines, vitamins, natural remedies, and certain foods may also interact. Using these products together might cause harmful side effects. Talk to your healthcare provider if you are taking:

  • thyroid medicine such as levothyroxine (Levothroid, Levoxyl, Synthroid, Unithroid), liothyronine (Cytomel, Triostat), liotrix (Thyrolar), and thyroid (Armour Thyroid)

If you are not sure if your medicines might interact, ask your pharmacist or healthcare provider. Keep a list of all your medicines with you. List all the prescription medicines, nonprescription medicines, supplements, natural remedies, and vitamins that you take. Be sure that you tell all healthcare providers who treat you about all the products you are taking.

How should I store this medicine?

Store this medicine at room temperature. Keep the container tightly closed. Protect it from heat, high humidity, and bright light.


This advisory includes selected information only and may not include all side effects of this medicine or interactions with other medicines. Ask your healthcare provider or pharmacist for more information or if you have any questions.

Ask your pharmacist for the best way to dispose of outdated medicine or medicine you have not used. Do not throw medicine in the trash.

Keep all medicines out of the reach of children.

Do not share medicines with other people.


Developed by RelayHealth.
Medication Advisor 2012.1 published by RelayHealth.
Last modified: 2011-03-23
Last reviewed: 2011-03-14
This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.
© 2012 RelayHealth and/or its affiliates. All rights reserved.
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