START AT 2.5 TO 3 CLICKS ON A INSULIN PIN, THAT'S ABOUT 1/4 CC------------GIVE IT ABOUT 5 MINUTES AND YALA ENJOY YOUR TRIP! I'VE HAD FRIENDS THAT HAVE DONE 1/2 CC TO 1 CC AT A TIME------------PERSONALLY I THINK 1CC IS TOO MUCH! YOU NEED A COMFORTABLE BED BECAUSE YOU WON'T BE GOING ANYWHERE ANYTIME SOON. THE KITTY I TRIED WAS FROM TTOKKYO --------------NO COMPLAINTS!