Air concentration of sarin (mg min/m3) 1 2 4 6 Effect Exposed human volunteers showing the effect Miosis 7% 50% 50% 100% Runny nose 17 80 100 100 Tight chest 4 80 100 100 Headache 20 7 5 50 Eye pain 17 0 0 54 Eye-lid twitch 0 4 4 4 Throat irritation 3 0 11 23 Sweating 0 0 0 18 Flu-like symptoms 10 0 27 59