Of the physiological parameters used in the present study, only diastolic blood pressure showed a significant decrease. Mirzaei et al., investigated additional physiological parameters of systolic and diastolic BP and heart rate after intervention and reported no significant change in the separameters. Kim et al., examined the effects of aromatherapy using different essences including geranium oil on the first clinical experience of nursery students to intravenous injection. They reported that of the parameters of systolic and diastolic BP and pulse rate, only pulse rate had showed a significant decrease.