nausea

Hi all

my son age 21 has just started getting nauseas (sp) when he has to go out, this started in july when he had to miss a trip to alton towers when he was sick in the car on the way. this morning he was due to go back to college and although he hasnt been sick he has felt sick and was unable to go. he has a doctors appointment on thursday, does anyone know of a way to cope with nausea that doesnt involve tablets as, the thought of taking tablets makes him sick.