Shallow Water Blackout x Isopropyl Alcohol Inhalation

[McJacksonMonsieur]

I came across the thread describing shallow water blackout as a method to attempt suicide. I could not induce dizziness via hyperventilating no mater how hard I tried and no matter how long I tried. I also attempted to increase blood flow via rigorous physical exercise and then hyperventilating but it, too, did not work. Then, earlier today after shaving, I realized that isopropyl alcohol often has the desired effect on me when inhaled. Therefore, I ask if breathing is fumes from isopropyl alcohol and then holding my breath until passing out in a full bathtub would work just as well as the method described in the original thread.

I am new here, so I apologize for any formatting issues.

 

[Intoxicated]

The SWB method is not based on hyperventilation-induced dizziness. It's based on increase of the duration of tolerable breath holding.

When you hold your breath for several minutes, the oxygen level in your blood drops and the carbon dioxide level in your blood increases. A lack of oxygen in the blood (known as hypoxemia) and excess of carbon dioxide (known as hypercapnia) stimulate respiration reflexes, making you want to breathe. While hypoxemia may produce some moderate and quite tolerable urge to breathe during breath holding, hypercapnia commonly produces very strong urge to breathe, which is hard to resist.

Hyperventilation is supposed to reduce the initial CO₂ level. When we breathe normally at rest, air in our lungs contains about 4 - 5% of CO₂ and the partial pressure of CO₂ there is about 4 - 5 kPa. The ambient air typically contains CO₂ at concentrations that are much less than 1%. When we hyperventilate without doing something that increases the rate of production of CO₂, we replace CO₂ in the lungs with fresh air, thus reducing the concentration and the partial pressure of CO₂ (possibly to 1% / 1kPa or less) there. Low partial pressure of CO₂ in the lungs leads to increased excretion of CO₂ from the blood via the lungs, so carbon dioxide escapes the blood faster than the organism produces it. This results in decrease of the CO₂ level in the blood and the tissues.

Low CO₂ level (known as hypocapnia) produces constriction of cerebral blood vessels, which may restrict the blood flow to the brain to a degree that produces dizziness. This perception of dizziness is not the purpose of hyperventilation on its own, it's only a symptom indicating that hypocapnia is achieved. When we hold our breath, the organism continues to produce CO₂, so its level in the blood will increase back to normal, then the cerebral blood vessels will dilate back to their normal state as well and the perception of dizziness will disappear.

Since the chain of transitions hypocapnia (low CO₂ level) -> normocapnia (normal CO₂ level) -> hypercapnia (high CO₂ level) takes more time than the transition normocapnia -> hypercapnia as long as other conditions are nearly the same, hyperventilation before breath holding makes it possible to hold our breath without significant discomfort for a longer period than usually. The SWB method relies on the possibility that this technique may allow relatively comfortable and sufficiently long breath holding that depletes the body's O₂ reserves to a degree where loss of consciousness occurs due to hypoxia.

Rigorous exercise before hypervantilating makes no sense, because exercise intensifies production of CO₂, whose level hyperventilation is supposed to reduce.

IDK whether isopropyl alcohol is able to suppress the CO₂-induced urge to breathe or make it more tolerable somehow.