Which of the following adverse events occurring during a study of an investigational new drug...

Sponsors must reportserious, unexpected, and suspected adverse reactions (SUSARs)to the FDA.

21 CFR 312.32(c)(2):“Any adverse experience associated with the use of the drug that is bothserious and unexpectedshall be reported…as soon as possible but no later than 7 calendar daysafter the sponsor’s initial receipt of the information, if it is fatal or life-threatening.”

ICH E2A 4.2:Requires expedited reporting oflife-threatening or fatal SUSARswithin 7 days.

Among the options, only (C) —death from arrhythmias not previously identified in the Investigator’s Brochure and suspected to be drug-related— meets the definition of a SUSAR requiring7-day expedited reporting. Events already listed in the IB (A, D) or unrelated to the drug (B) do not trigger expedited reporting.

Thus, the correct answer isC.