An issue of great importance within New Zealand society is the high level of binge drinking. The effects of alcohol on consumers’ health are of great concern. Physical, psychological, social, economic and behavioural aspects have been researched over the years by multiple disciplines. The effects of binge-drinking and the ‘hangover’ effects on mood levels were investigated in this research project. Fifty participants (25 males and 25 females) who regularly participated in binge drinking were selected to partake. All participants completed questionnaires which included demographic information, attitudes towards drinking and drinking behaviours. This was followed by completing the Alcohol Use Questionnaire (AUQ) and the Alcohol Use Disorders Identification Test (AUDIT). All participants were required to complete a 30 day mood rating scale. This was designed as a five-point rating scale system. These rating scales looked at, anxiety, depression, emotion, physiological and provided an overall rating. This also included recording the number of standard drinks consumed the previous evening, types of alcohol consumed, and the number of hours slept. Ten randomly selected participants were interviewed. The results collected were significant and supported the predictions that there is a relationship between the number of standard drinks consumed and increased levels of anxiety and depression, however the correlations were rather weak. The findings also supported the predictions that there is a link between the numbers of standard drinks consumed and decreased levels of physical mood, emotional mood and overall daily mood. The effect of alcohol in regards to increasing aggressive behaviour was evident in the male group, however not in the female group.