Working with the insect killer can lead to severe illness in approximately 4 to 14 percent of cases. The concern over people preparing and intentionally inhaling the drug is also tied to its known warnings - the drug is most dangerous when inhaled. Other side effects that have been described are headache, nausea, incoordination, tremors, facial flushing and swelling and burning and itching sensations. Pyrethroids are toxins that can be deadly, either through respiratory failure or paralysis. The substance also causes over-activation of the sympathetic nervous system, often referred to as the “fight or flight” response, which can lead to excitability, heart racing and difficulty breathing. In humans, they block normal nerve signaling, causing abnormal sensation and, in the worst cases, seizures or even paralysis. In insects, pyrethroids stun and then kill. How can an insect killer get someone high? The active ingredient in pesticides is a class of molecules known as pyrethroids, which penetrate the insect’s nervous system. But because this practice is relatively new, it remains to be seen how toxic or deadly it will be on a large scale. Extreme physical responses to wasping have been reported in some cases.
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