Some people experience mild hallucinations from laughing gas. Others may feel a bit confused after the effects of the gas have worn off. Your dentist will need to feed you oxygen afterwards, to prevent a headache from developing. Still curious about how does nitrous oxide work? Your dentist will probably test some laughing gas on you prior to your treatment, to get an idea of what sort of dose you will require. To find out more about happy gas and whether it could work for you, please contact us for an appointment.