Adverse reactions mediated by ^99mTc-tetrofosmin: Literature review and analysis of post-marketing reports

^99mTc-tetrofosmin is a diagnostic radiopharmaceutical used to evaluate cardiac pathologies. Despite the lower incidence of reactions compared to other drugs, radiopharmaceuticals can still cause adverse reactions. For this reason, pharmacovigilance plays a crucial role in detecting, understanding, evaluating and preventing them.

This study aims to review the available literature,on the safety of ^99mTc-tetrofosmin, and to analyze spontaneous adverse drug reaction reports from the European EudraVigilance database.

A literature review was conducted according to PRISMA methodology. An analysis of spontaneous notifications was carried out in EudraVigilance, until 2022.

The review identified a selection of 7 articles. The most reported adverse reactions were skin irritation, strange taste in the mouth and nausea. Regarding the EudraVigilance analysis, 220 notifications were identified, accounting for 477 adverse reactions. The majority belong to males (51%), between 18-64 years (45%). Health professionals were the main reporters (84%). The most prevalent System Organ Class was "general disorders and administration site conditions" (21%) and the most reported adverse reaction was pruritus (10%). Approximately 67% of reactions were considered serious, with 6 fatal cases recorded.

The results demonstrated that adverse reactions associated with ^99mTc-tetrofosmin do occur and should not be minimized. Over a period of 17 years, only 220 notifications were recorded, which may highlight potential challenges in pharmacovigilance for radiopharmaceuticals. Therefore, raising awareness about the importance of reporting adverse reactions is crucial.