What is a potential side effect of Tc-99m radiopharmaceuticals?

• A. Headaches in all patients
• B. Allergic reactions or sensitivities
• C. Nausea is guaranteed
• D. Vision problems

Answer: (B)

Technetium-99m (Tc-99m) radiopharmaceuticals are widely used in nuclear medicine for various diagnostic imaging applications. One of the potential side effects associated with the administration of these substances is the possibility of allergic reactions or sensitivities. This can manifest as localized reactions at the injection site or, in more severe cases, systemic reactions such as rash, itching, or anaphylaxis. While such reactions are relatively rare, they are recognized as a significant concern when using any pharmacological agent, including radiopharmaceuticals.

Other potential side effects listed, such as guaranteed nausea or headaches occurring in all patients, do not accurately represent the typical profile of reactions to Tc-99m radiopharmaceuticals, as these symptoms do not universally affect every patient who undergoes such procedures. Also, vision problems are not a recognized side effect linked to Tc-99m. Therefore, the specific risk of allergic reactions highlights the importance of monitoring patients for any signs of sensitivity following the administration of radiopharmaceuticals.