People who inhale droplets of Agent H experience nausea and vomiting, paralysis, dry mouth and difficulty in breathing. The paralysis spreads to the limbs. In the arms it commences in the shoulders and travels to the forearms; in the legs from the thighs down to the feet. Difficulty in breathing and the resulting buildup of cabrbon dioxide leads to coma.
Death occurs within thirty minutes of inhalation. And yet ,in the following extract from Frederick Holden's diary the scientist believes that the prolonged suffering can be justified:
'We mustn't balk at using Agent H even though there will undoubtedly be suffering. Peace cannot be achieved without war and peace is worth fighting for.' - extract from the diary of Frederick Holden - reproduced with permission of the publisher of The Biocide Conspiracy