Technetium tc-99m pyrophosphate

Drug Interactions The biodistribution of technetium Tc 99m pyrophosphate may be altered in the presence of high levels of certain cations (iron, calcium, and aluminum). This may result in reduced uptake of radionuclide in the skeleton and increased extraosseal uptake, which may potentially degrade imaging quality. In patients with high levels of these cations caused by concomitant medications, particularly patients receiving iron infusions, consider performing an imaging study with technetium Tc 99m pyrophosphate injection once the cation levels have normalized (e.g., after 3 to 5 half-lives of the cation). (See WARNINGS .)

Pregnancy Animal reproduction and teratogenicity studies have not been conducted with Technetium Tc 99m Pyrophosphate Injection. It is also not known whether Technetium Tc 99 Pyrophosphate Injection can cause fetal harm when administered to a pregnant woman or can affect reproductive capacity. Technetium Tc 99m Pyrophosphate Injection should be given to a pregnant woman only if clearly needed. Ideally, examinations using radiopharmaceuticals, especially those elective in nature, to a woman of childbearing capability should be performed during the first few (approximately 10) days following the onset of menses.

Nursing mothers Technetium Tc 99m Pyrophosphate Injection is excreted in human milk during lactation, therefore, formula feeding should be substituted for breast feeding. Pediatric use Safety and effectiveness in pediatric patients have not been established. Geriatric use Clinical studies of the Kit for the Preparation of Technetium Tc 99m Pyrophosphate Injection did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients.

In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy. This drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.

General The lyophilized contents of the Kit for the Preparation of Technetium Tc 99m Pyrophosphate Injection reaction vial are to be administered to the patient only as an intravenous solution (see Procedures for Reconstitution). Any Sodium Pertechnetate Tc 99m solution which contains an oxidizing agent is not suitable for use with Kit for the Preparation of Technetium Tc 99m Pyrophosphate Injection. When reconstituted with Sodium Pertechnetate Tc 99m, Technetium Tc 99m Pyrophosphate Injection must be used within 6 hours.

Kit for the Preparation of Technetium Tc 99m Pyrophosphate Injection may also be reconstituted with sterile, non-pyrogenic isotonic saline containing no preservatives and injected intravenously prior to the administration of Sodium Pertechnetate Tc…

Nursing mothers Technetium Tc 99m Pyrophosphate Injection is excreted in human milk during lactation, therefore, formula feeding should be substituted for breast feeding.