ɡɹˈɛpɐflˌɑːksɐsˌɪn wʌz wɪθdɹˈɔːn wˈɜːldwaɪd fɹʌm mˈɑːɹkɪts ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn, dˈuː tʊ ɪts sˈaɪd ɪfˈɛkt ʌv lˈɛŋθənɪŋ ðə kjˌuːtˈiː ˈɪntɚvəl ɔnðɪ ɪlˌɛktɹoʊkˈɑːɹdɪˌoʊɡɹæm, lˈiːdɪŋ tə kˈɑːɹdiˌæk ᵻvˈɛnts ænd sˈʌdən dˈɛθ.
Grepafloxacin was withdrawn worldwide from markets in 1999, due to its side effect of lengthening the QT interval on the electrocardiogram, leading to cardiac events and sudden death.