A reduction in alertness and lower levels of performance are commonly associated with the common cold. Paracetamol has been shown to be more effective than placebo in treating symptoms associated with upper respiratory tract infection; caffeine has been shown to increase levels of alertness and improve performance of people suffering from colds. This study will investigate any improvement in alertness and performance based on cognitive function and mood assessment in subjects suffering from the common cold, when taking a novel paracetamol and caffeine combination verses paracetamol alone.