 [ Symptoms ] does the flu shot cause narcolepsy i have been just informed that i have narcolepsy i have been reading online that the flu shot has caused narcolepsy in children back in 1980s i was in the services and had to have a flu shot could this have caused me to develop narcolepsy i have never had a flu shot til i was in the service the doctor told me that i have had this for several years and that it has begun to get worse i will be 50 in may [ Disease ] no i do not believe that the flu vaccine causes narcolepsy as a matter of fact the cause of narcolepsy is really idiopathic not known