tetrofosmin: clinical use

Prescribing considerations

• Diagnostic use only; restricted to authorised personnel in designated nuclear-medicine settings.
• Justify radiation exposure individually and use the lowest activity providing the required diagnostic information.
• Review medicines affecting myocardial function or blood flow when interpreting images.
• Not recommended for children or adolescents because supporting data are unavailable.
• Use caution in renal or hepatic impairment because pharmacokinetics are uncharacterised and radiation exposure may increase.

Contraindications and cautions

• Hypersensitivity to tetrofosmin or any listed excipient.
• Pregnancy.
• For stress imaging, separately assess contraindications associated with the chosen stress method.

Monitoring

• Confirm pregnancy and breastfeeding status before administration.
• Ensure facilities and trained staff for managing anaphylaxis are immediately available.
• Encourage hydration and frequent voiding afterwards.
• During stress testing, monitor according to the selected stress procedure.
• Interpret breast imaging cautiously: small lesions may be missed, negative imaging does not exclude malignancy and axillary staging is unsupported.

Clinical pharmacology

Technetium-99m tetrofosmin is a lipophilic diagnostic complex whose myocardial uptake relates to coronary blood flow. Uptake is rapid and sufficiently retained for planar or SPECT imaging; background activity clears through urinary and faecal routes.

Formulation and product differences

• The product is a non-radioactive powder kit requiring reconstitution with sodium pertechnetate technetium-99m.
• Vial contents must not be injected directly. The prepared product is a clear, colourless intravenous solution requiring radiochemical-purity testing and radiation-safe handling.