While not mentioned often in the literature and blogs I’ve read, fetid fumes are a byproduct of cancer treatment. Not surprising, since one of my chemo drugs is Cyclophosphamide, a derivative of mustard gas.
The foul odor of normal flatus mainly results from:
- low molecular weight fatty acids such as butyric acid (rancid butter smell);
- reduced sulfur compounds such as hydrogen sulfide (rotten egg smell);
- carbonyl sulfide that are the result of protein breakdown. http://en.wikipedia.org/wiki/Flatulence
Pharmaceutically enhanced flatulence is in a whole other class. It is wicked deadly and should be avoided, especially by pregnant women and nursing mothers. If you encounter it, hold your breath and back out of the room. The perpetrator will understand.
One solution would be the air-tight underwear with a replaceable charcoal filter invented by Chester Weimer of nearby Pueblo, Colorado. Another is just to grin and bear it.