Vomiting
You can stop your vomiting by grating an onion, squeezing it with a cheesecloth and collect the juice. Brew it with some peppermint tea and allow it to cool down. Drink two teaspoons of the onion juice and wait for five minutes, then again drink two teaspoons of peppermint tea. Do this on repeat until you feel the sensations have stopped.
Cleanse the Air
Onion sucks the bacteria and viruses out of the air and helps in purifying it, because of its anti bacterial properties.