parasites secrete ammonia as a normal biological waste product. If you've ever smelled smelling salts you know what ammonia smells like. Ammonia is a strong adrenal stimulant. It stimulas the adrenals to secret adrenalin. Well adrenalin is mostly used for the fight or flight machanism we've all heard about. But when there's nothing to fight or flee from it's called a panic attack.
I sufferd with them for years and they do ruin your life.
So, once the bugs are gone - no more ammonia - no more adrenal stimulation - no more panic attacks. It's great.