<prompt> Umuthi wokuqala wokwelapha umfutho wegazi ophakeme, i-sodium thiocyanate, wasetshenziswa ngo-1900 kodwa waba nemiphumela eminingi emibi futhi wawungathandwa. Amanye ama-ejenti amaningana athuthukiswa ngemuva kweMpi Yezwe Yesibili, athandwa kakhulu futhi asebenza kahle kakhulu kuwo kwakungu-tetramethylammonium hexamide, i-chlorethonium, i-hydralazine, ne-renamine sulfate evela esitshalweni se-subwolfia. Akukho neyodwa yalezi ezazisetshenziswa ngemiphumela emibi: ukunqandwa okuqinile kwe-sodium ngokwesibonelo ukudla kwelayisi, i-sympathectomy ukususwa kokuhlinzwa kwezingxenye zesistimu yezinzwa, kanye nokwelashwa kwe-pyrogen umjovo wezinto ezibangela umkhuhlane, ukunciphisa ngokungaqondile umfutho wegazi. Umuthi wokuqala wokwelapha umuthi wokwelapha umuthi wokwelapha, i-sodium thiocyanate, wasetshenziswa ngo-1900 kodwa waba nemiphumela eminingi emibi futhi wawungathandwa.  <response>: isidleke 