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This medication is used before X-ray imaging tests (such as CT scans). Iohexol contains iodine and belongs to a class of drugs known as contrast media or dyes. It works by adding contrast to body parts and fluids in these imaging tests. Iohexol improves the images obtained during a CT scan, so your doctor can more easily diagnose your condition.
Read your doctor's specific instructions on when and how to take iohexol before your imaging test. To make it easier to swallow, this medication can be mixed with water, carbonated beverages, milk, or juice. Your doctor or pharmacist should tell you the amount of iohexol to use and how much liquid to dilute it in.
Take this medication by mouth as directed by your doctor. It is usually taken just before the imaging test. The dosage is based on the specific imaging test, your age, and your weight.
Drink plenty of fluids before and after the imaging test, unless directed otherwise by your doctor.
This medication may also be given by a health care professional by injection into a vein, joint, the spine, or placed in the bladder or the rectum. If given these ways, there are different precautions and side effects to be aware of. Talk to your doctor or pharmacist for more details.
Diarrhea, nausea, vomiting, stomach pain, gas, or headache may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Tell your doctor right away if you have any serious side effects, including: signs of kidney problems (such as change in the amount of urine).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Before taking iohexol, tell your doctor or pharmacist if you are allergic to it; to other contrast media; or to iodine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: asthma, hay fever, an inability to make urine (anuria).
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Children and older adults may be more sensitive to the side effects of this drug, especially diarrhea.
When taken by mouth, this medication is unlikely to pass into breast milk. Consult your doctor before breast-feeding.
Store at room temperature away from light. Do not freeze. Keep all medications away from children and pets.
One product that may interact with this drug is: metformin.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe diarrhea, or severe abdominal cramping.
Not applicable. This medication is given once before your imaging test. It is important to take this medication at the time prescribed by your doctor. If you forget to take the dose, your imaging test may need to be rescheduled.
Do not share this medication with others.