Does Iron Supplements Interact with Technetium Tc 99m Pyrophosphate?
Iron Supplements and Technetium Tc 99m Pyrophosphate have a moderate drug interaction according to U.S. FDA drug labeling data. High levels of iron from concomitant iron infusions may alter biodistribution of technetium Tc 99m pyrophosphate, reducing skeletal uptake and increasing extraosseous uptake, potentially degrading imaging quality. The mechanism involves iron cations interfere with radionuclide biodistribution. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Moderate
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Iron Supplements and Technetium Tc 99m Pyrophosphate occurs because iron cations interfere with radionuclide biodistribution. Clinically, this means high levels of iron from concomitant iron infusions may alter biodistribution of technetium tc 99m pyrophosphate, reducing skeletal uptake and increasing extraosseous uptake, potentially degrading imaging quality. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Iron Supplements and your doctor is considering prescribing Technetium Tc 99m Pyrophosphate (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider