OPHTHALMOLOGY, June 2012, V116, No 6 page 1281: "In conclusion, our study indicates that there was a significantly higher incidence of nausea when fluorescein was injected over 10 seconds compared with 2 seconds. To our knowledge, this is the first prospective double-masked, randomized, controlled trial looking into the effect of speed of injection and incidence of nausea during FFA."................check it out. Kirby