“…We can only speculate that perhaps due to processes such as knowledge decay, any prolonged amount of time without mathematical calculation exposure can result in a deterioration in performance. [2,3,[5][6][7][8][9][10] Without further qualitative feedback World J Emerg Med, Vol 3, No 3, 2012 from the students, the reasons behind such poor performance are unclear. Interestingly 62% (n=57) of students believed that they did not have any drug calculation issues , which is supported by the results found in the study by Hubble et al [3] where 63.5% of the practising qualifi ed paramedics in the United States who participated in a survey believed that drug calculations were 'not stressful at all'.…”