Iohexol
About Iohexol
Iohexol is a specialised diagnostic injection used to help doctors see internal organs, blood vessels, and tissues more clearly during imaging tests such as CT scans and X-rays. It works by temporarily changing the way X-rays pass through certain parts of your body, allowing clearer images to be produced for an accurate diagnosis. It is not used to treat any disease or symptom directly but serves as an important tool to help guide your medical care.
Because this medicine is given as a single injection or infusion during a scheduled medical procedure, you do not need to take it on a regular schedule. Before your scan, your healthcare team may ask you to avoid eating solid food for several hours, depending on the type of examination you are having. Drinking plenty of water before and after the procedure helps your kidneys remove the medicine from your body more efficiently.
Most people receive this injection without any serious problems. It is very common to experience a temporary feeling of warmth or flushing throughout your body or notice a metallic taste in your mouth shortly after the injection. These sensations are usually harmless and disappear within a few minutes. However, tell the medical team immediately if you develop hives, severe itching, difficulty breathing, swelling of your face or throat, or any other symptoms of an allergic reaction during or after the procedure.
Before receiving this injection, tell your doctor if you have kidney disease, diabetes, thyroid problems, asthma, heart disease, multiple myeloma, or a history of severe allergic reactions to contrast agents. Do not receive this medicine if you have previously experienced a severe, life-threatening allergic reaction to iohexol or another iodinated contrast agent unless your doctor decides the benefits outweigh the risks and appropriate precautions are in place.
Tell your doctor about all prescription medicines, over-the-counter medicines, vitamins, herbal products, and supplements you are taking before your scan. In particular, metformin may need to be temporarily stopped around the time of the procedure if you have reduced kidney function. Avoid becoming dehydrated before your scan because dehydration may increase the risk of kidney problems. If you are pregnant, breastfeeding, or an older adult, discuss the potential benefits and risks of this medicine with your doctor before the procedure.
Uses of Iohexol
Medicinal Benefits
Iohexol helps doctors obtain clear, detailed images that support accurate diagnosis and treatment planning.
- Provides clearer diagnostic images: Improves the visibility of internal organs, blood vessels, and body tissues during imaging tests.
- Supports accurate diagnosis: Helps doctors identify abnormalities such as blockages, tumours, bleeding, kidney stones, or other structural problems more precisely.
- May reduce the need for more invasive procedures: Detailed imaging may help avoid exploratory surgery or other invasive diagnostic tests.
- Helps guide appropriate treatment: Accurate imaging allows your healthcare team to plan the most suitable treatment based on reliable diagnostic information.
Directions for Use
- Follow your doctor’s instructions on the dosage and timing of this medication.
- Iohexol is administered by the doctor or healthcare professional.
- Do not self-administer.
Storage
Side Effects of Iohexol
Common Side Effects (Usually mild):
- A temporary feeling of warmth or flushing
- A metallic taste in the mouth
- Mild nausea or an upset stomach
- Dizziness or light-headedness
Serious Side Effects (Consult your doctor right away):
- Signs of a severe allergic reaction, such as swelling of the face, lips, tongue, or throat
- Difficulty breathing, wheezing, or severe coughing
- Severe skin rash, hives, or intense itching
- Passing little or no urine, which may indicate kidney problems
- A rapid, irregular, or pounding heartbeat
Drug Warnings
- Check your kidney function: Your doctor may recommend kidney function tests before your scan, especially if you have kidney disease, diabetes, or are over 65 years of age.
- The solution should be inspected before use: Healthcare professionals should ensure the injection is clear, colourless to pale yellow, and free from visible particles before administration.
- Report injection-site discomfort immediately: Tell the healthcare team if you notice burning, stinging, pain, or swelling while the medicine is being injected.
- Tell your doctor if you have thyroid disease: Because this medicine contains iodine, it may temporarily affect thyroid function.
- Remain under observation after the procedure: You may be asked to stay at the clinic or hospital for about 30 minutes because most serious allergic reactions occur shortly after the injection.
Drug Interactions
- Metformin: Your doctor may advise temporarily stopping metformin around the time of the scan, particularly if you have reduced kidney function, to reduce the risk of lactic acidosis.
- Medicines that affect the kidneys: Certain antibiotics, NSAID pain relievers such as ibuprofen, and other medicines that may affect kidney function can increase the risk of kidney problems when used with iodinated contrast agents.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
cautionIt is unknown if alcohol interacts with Iohexol. Please consult a doctor if you have any concerns.
Pregnancy
cautionIohexol should be used in pregnancy only if clearly needed. If you are pregnant, inform your doctor beforehand.
Breast Feeding
cautionThere is limited data on the use of Iohexol during breastfeeding. Consult your healthcare provider to assess risks and benefits.
Driving
cautionIohexol may affect vision temporarily. Avoid driving or operating heavy machinery if you experience visual disturbances after the injection.
Liver
cautionIf you have a history of liver disease, inform your doctor before receiving Iohexol. It should be used with caution in patients with severe liver impairment.
Kidney
cautionIf you have a history of kidney disorder, inform your doctor before receiving Iohexol. It should be used with caution in patients with severe kidney impairment.
Children
cautionYour doctor will adjust the dosage of name for children based on age, weight, and the imaging procedure, ensuring it is used safely.
Habit Forming
Diet & Lifestyle Advise
- Drink plenty of water: Staying well hydrated before and after the procedure helps your kidneys remove the medicine from your body.
- Follow fasting instructions carefully: Avoid solid food for the recommended period before your scan if your healthcare team instructs you to do so.
- Rest after the procedure if needed: If you feel light-headed or dizzy after the scan, sit or lie down until you feel better.
- Limit alcohol and caffeine for the next 24 hours: These drinks may contribute to dehydration, making it harder for your kidneys to eliminate the medicine efficiently.
Special Advise
Iohexol may affect certain laboratory tests (like the protein-bound iodine test), potentially leading to inaccurate results.
Patients Concern
Disease/Condition Glossary
Angiography: Angiography is a medical imaging procedure used to see inside blood vessels and organs, frequently to diagnose blockages, aneurysms, or arterial disorders.
CT Scan: CT scan is a diagnostic imaging method that uses X-rays to produce comprehensive images of organs, bones, and soft tissues within the body.
Radiography: Radiography is a type of diagnostic imaging that uses X-rays to inspect inside tissues. It is widely used to detect fractures, infections, and abnormal growths.
FAQs
Iohexol is a contrast agent used in diagnostic imaging procedures such as X-rays, CT scans, and angiography. It helps enhance the visibility of blood vessels and internal organs, allowing for better imaging and accurate diagnosis of various conditions.
Iohexol works by absorbing X-rays and enhancing the contrast in the images taken during diagnostic procedures. This helps doctors observe blood vessels, organs, and tissues with greater detail, enabling accurate diagnoses.
If you have kidney problems, consult your doctor before receiving Iohexol, as it may increase the risk of kidney complications. Your doctor may adjust the dosage or option for an alternative contrast medium.
Iohexol should only be received during pregnancy or breastfeeding if necessary. Consult your doctor if you are pregnant or breastfeeding before receiving it.
Common side effects may include diarrhea, nausea, vomiting, stomach pain, gas, back pain, sweating, or headache. Seek medical care if the symptoms persist or worsen.
Iohexol is generally safe for most people, however, it should be used with caution in persons who are allergic to iodine, have kidney difficulties, or have had previous contrast reactions. Always counsel your doctor about any pre-existing conditions.
In people with normal kidney function, most of the medicine is removed from the body in the urine within about 24 hours. Drinking plenty of water after the procedure helps your kidneys eliminate it more efficiently.
Yes. A temporary feeling of warmth or flushing is one of the most common effects of this medicine. It usually lasts only a minute or two and settles on its own.
Most people can drive home if they feel well after the procedure. However, if you feel dizzy, light-headed, or unwell, wait until you have fully recovered before driving or arrange for someone else to take you home.
Only an extremely small amount of this medicine passes into breast milk, and very little is absorbed by a breastfed baby. Most medical guidelines do not recommend stopping breastfeeding after receiving iohexol. If you have concerns, discuss them with your doctor before the procedure.
Yes, it may still be used when necessary, but your doctor will assess your kidney function carefully before the procedure. Extra precautions, such as ensuring you are well hydrated or adjusting your care plan, may be recommended.
Your preparation instructions depend on the type of imaging procedure you are having. You may be asked to avoid solid food for several hours before the scan while continuing to drink clear fluids, unless your healthcare team advises otherwise. Always follow the instructions provided by your hospital or imaging centre.
Yes. Although most people do not experience serious problems, allergic reactions can occur. Mild reactions such as itching or a rash are more common, while severe reactions are rare. Your healthcare team is prepared to recognise and treat these reactions promptly if they occur.
A temporary metallic taste is a common and harmless effect of iodinated contrast agents. It usually disappears within a few minutes after the injection has been completed.
