Do not mistake "survival" for a safety net: After ingesting pesticides or inhaling gas, the emergency room can save your life, but it may not save your lungs and brain

No cost involved. It simply helps you understand this reality up front.

A systematic review of paraquat poisoning: the fatality rate is extremely high because it is inherently highly toxic and lacks effective treatment. It is actively transported into lung tissue against a concentration gradient, scientifically known as active uptake against a concentration gradient, resulting in pneumonia and pulmonary fibrosis. It also causes kidney and liver damage. The review specifies: gastric lavage should not be performed. Hemodialysis and hemoperfusion are unlikely to alter the clinical course. The evidence for the efficacy of steroids and immunosuppressants is weak. The review also states: "The fatality rate is high in all centers, despite large differences in treatment." Between 2013 and 2024, 10 tertiary hospitals in Bangladesh admitted 1,420 cases, of which 257 were analyzable: fatality rate 43.2%. Common manifestations include lower limb edema caused by acute renal failure 71.2%, vomiting 65.8%, and abdominal pain 58.0%. The trial for acute carbon monoxide poisoning was a double-blind randomized controlled trial, with 76 people in each of the two groups. Neither the doctors nor the patients knew which group they were in. At six weeks, those with cognitive sequelae in the hyperbaric oxygen group were 19/76 (25.0%). In the normobaric oxygen group, it was 35/76 (46.1%), P=0.007. After adjusting for other factors, the odds ratio was 0.45 (OR 0.45), (95% CI 0.22 to 0.92, the numbers in parentheses represent the confidence interval of this value). Another study observed 73 cases continuously: 30% had cognitive sequelae, and 12% showed high signal in the white matter. In China, since July 1, 2014, the registration and production permits for paraquat aqueous solutions have been revoked, and production has ceased. Since July 1, 2016, the sale and use of aqueous solutions have ceased within the country. Since September 26, 2020, the sale and use of soluble gel formulations are prohibited within the territory. The document states that "the occurrence of paraquat ingestion suicide incidents" is the direct reason for strengthening supervision.

Gawarammana IB, Buckley NA (2011). Medical management of paraquat ingestion. British Journal of Clinical Pharmacology, 72(5), 745-757. https://doi.org/10.1111/j.1365-2125.2011.04026.x；Chowdhury FR 等 (2026). Clinical and Laboratory Profile of Paraquat Poisoning: A Toxicological Crisis in Bangladesh. American Journal of Tropical Medicine and Hygiene, 115, 176-182. https://doi.org/10.4269/ajtmh.25-0719；Weaver LK, Hopkins RO, Chan KJ, et al. (2002). Hyperbaric oxygen for acute carbon monoxide poisoning. New England Journal of Medicine, 347(14), 1057-1067. https://doi.org/10.1056/NEJMoa013121；Parkinson RB, Hopkins RO, Cleavinger HB, et al. (2002). White matter hyperintensities and neuropsychological outcome following carbon monoxide poisoning. Neurology, 58(10), 1525-1532. https://doi.org/10.1212/wnl.58.10.1525；农业农村部办公厅 (2018). 关于切实加强百草枯监督管理的通知（农办农〔2018〕17 号）. https://www.gov.cn/zhengce/zhengceku/2018-12/31/content_5442594.htm

Rated B because The subjects of these studies are poisoned patients, not a single group of suicide attempters; the carbon monoxide trial also included people with accidental poisoning. Therefore, the above proportions of sequelae cannot be directly treated as the "probability of consequences for suicide attempters." Only one thing can be certain: no method can guarantee no sequelae. For on-site management of carbon monoxide, see Section 13, item 19. For accidental ingestion of pesticides and drugs, do not induce vomiting first; bring the bottle to the hospital, see Section 13, item 20. For not stockpiling pesticides and sleeping pills at home, see item 25 of this section. This book does not compare the fatality rates of different methods, nor does it write any specific procedures.