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If they had aspirated water it could cause a pneumonia, even Adult Respiratory Distress Syndrome see What Is ARDS? - NHLBI, NIH, if this caused serious scarring (unusual) it could cause you to be short of breath on exertion.

Image source: Insomnia | NHLBI, NIHI am 76 years old and therefore have no melatonin production of my own.My regular sleep supplement every night is 3 mg of melatonin.Sometimes this is not enough, because I watched an exciting movie or I wrote to much for Quora online. When I can’t fall asleep within 30 minutes I take a capsule of 500 mg of valerian root. I would say that this helps in 95% of the nights to fall asleep.If for some reason I still can’t fall asleep, I use 25 drops of Vogel’s Passion Flower Extract: Nature's Answer, Passionflower Extract, Low Alcohol, 1,600 mg, 1 fl oz (30 ml). I find that this is very reliable and puts me to sleep within 15 to 20 minutes of taking it.This way I am avoiding prescription narcotics and I am not getting addicted to benzodiazepines. The last step (Passion Flower Extract ) I require only once or twice a month. The chemical in the Passion Flower Extract is very similar to benzodiazepines, which means you don’t want to take this every night or your system could get addicted to it.Sleeping through is another issue. When I wake up in the middle of the night (typically between 2AM or 3AM) to urinate I may have a problem falling asleep again. In that case I take another dose of melatonin 3 mg, which usually settles me down and I sleep through until the morning.More information: Valerian root vs. melatonin: Differences, and how do they help?

Because the harmful effects of smoking aren’t so forgiving. The world isn’t such a perfect place, after all.A simple suctioning procedure, or like you say vacuuming, that puts a tube into the lungs to suck out phlegm/mucus will do nothing to reverse the damage smoking leaves.I’ll try to explain why with a simpler example.Have you ever had to deal with stubborn stains on your carpet? The stains that from the get go seemingly set themselves rigidly into the fabric? The kind that ends up wrecking the carpet’s material?I reckon you have (in some form). So, let me ask you this — does vacuuming help? Does the stain go away? Does the fabric/carpet return to its original quality?No, it doesn’t. Vacuuming would’ve worked had you been cleaning dust off the carpet but with stains, no, not really.Smoking and suctioning work the same way.Carbon/tar deposits from smoking are the stubborn stains and suctioning mucus the vacuuming.Smoking damages and destroys the fabric of the respiratory system — the lung tissues.Smoking causes the air sacs in the lungs — the functional units where oxygen is exchanged for carbon dioxide — to lose its elasticity. It does so by breaking down a component called ‘elastin’ in the walls of the air sacs.(Notice how the healthy one looks like a bunch of grapes but the damaged one like a floppy rubber band. The black arrows show the airflow) ImageThe loss of elastin causes the air sacs become loose. Their elastic recoil is lost. The effects of this (and smoking in general) is —Irritation and inflammation of airwaysIncreased mucus production that accumulates in the floppy airways eventually blocking them.Air gets trapped inside the blocked airwaysLesser volume of oxygen and carbon dioxide are exchanged per breathRespiratory distress sets inThese symptoms make for ‘emphysema’ and ‘chronic bronchitis’, collectively known as C.O.P.D. or Chronic Obstructive Pulmonary Disorder.As you may have realized by now, all of this is structural damage. The quality of lung tissue deteriorates.Suctioning can give symptomatic relief by aiding mucus removal. But it cannot reverse the anatomical damage smoking leaves behind. Suctioning cannot repair the air sacs to make them elastic again. Treating the symptoms is not the same as a cure.So, no matter how many times a year smoker go for lung-cleansing (getting vacuumed or whatever), the damage is there to stay. It has become one with the lung fabric. The carbon deposits are like the tattoo you never wanted.The best help that the smokers, at this point, can provide themselves with would be to quit smoking completely. Cold turkey style.There aren’t any easy ways out.What Is COPD? - NHLBI, NIHWhat Are the Risks of Smoking?