The exothermic peak at 73°C might be due to the recrystallization of glassy form of solidified acetaminophen melt, which was consistent with other reports.4,6,9,10) However, the interpretations of the exo- thermic peak at 125°C were controversial, including habit transformation and solid state conversion from form II to form I,8,10) although our thermal FT-IR microscopic results failed to support these explanations.