Irabglu (Fludeoxyglucose (18f))

• Irabglu is employed in PET imaging to evaluate metabolic activity across several clinical domains.
• Oncologic imaging: visualizes tumor glucose metabolism to aid diagnosis, staging and therapy response assessment.
• Neurological assessment: detects altered cerebral glucose uptake in epilepsy, dementia and brain tumors.
• Cardiac perfusion and viability: identifies myocardial metabolic activity to differentiate viable from scarred tissue.
• Inflammatory disease evaluation: highlights active inflammatory lesions in vasculitis or sarcoidosis.

• Fludeoxyglucose (18F) is a glucose analogue labelled with the positron‑emitting radionuclide fluorine‑18. After intravenous injection it is transported into cells via GLUT transporters and phosphorylated by hexokinase to FDG‑6‑phosphate. Because the phosphate group cannot be further metabolised, the compound becomes trapped intracellularly in proportion to the cell’s glycolytic activity. The accumulated radioactivity is then detected by PET scanners, producing images that reflect regional metabolic rates.

Adverse reactions to Irabglu are generally related to the radiopharmaceutical nature of the product and the intravenous administration.

Common Side Effects

• Mild nausea or vomiting: transient gastrointestinal upset occurring shortly after injection.
• Injection‑site flushing or warmth: brief sensation of heat or redness at the venipuncture site.
• Headache or dizziness: temporary central nervous system discomfort that resolves without intervention.
• Brief hypotension: slight drop in blood pressure that normalizes quickly.

Serious or Rare Side Effects

• Severe allergic reaction or anaphylaxis: rapid onset of hives, airway swelling, or circulatory collapse requiring emergency care.
• Radiation‑induced skin injury: localized erythema or ulceration at the injection site from excessive exposure.
• Acute cardiopulmonary events: arrhythmias or pulmonary embolism that may be life‑threatening.
• Persistent severe hypotension: prolonged low blood pressure needing medical management.

• When using Irabglu, clinicians should observe several safety considerations.
• Patient selection: assess suitability for PET imaging and evaluate contraindications.
• Pregnancy and lactation: avoid use unless benefits outweigh potential fetal radiation risk.
• Blood glucose control: ensure fasting glucose is within acceptable range to prevent inaccurate uptake.
• Renal function: evaluate kidney performance as impaired clearance may affect tracer distribution.
• Allergy assessment: screen for known hypersensitivity to fluorine‑18 compounds or excipients.
• Radiation safety: follow institutional protocols to protect staff and other patients.
• Store at ambient temperature: keep in original shielded container, protect from light, do not freeze.

Irabglu may interact with other agents that influence glucose metabolism or radiotracer distribution.

Major Interactions (Avoid)

• High blood glucose levels: elevated glucose competes with FDG, reducing image quality.
• Concurrent administration of other radiopharmaceuticals: may cause overlapping signals and diagnostic confusion.
• Iodinated contrast agents used within 24 h: can alter biodistribution of FDG.
• Recent chemotherapy: may alter cellular metabolism and affect FDG distribution.

Moderate Interactions (Monitor Closely)

• Insulin therapy: timing of insulin may affect tracer uptake, requiring coordination.
• Medications affecting glucose metabolism (e.g., metformin): may need temporary discontinuation.
• Renal‑clearing drugs (e.g., diuretics): could modify tracer excretion and background activity.
• Beta‑blockers: can influence myocardial uptake, requiring interpretation caution.