Some people swear that drinking salt water can make them vomit immediately. Haven’t tried it but just thinking about drinking a glassful of the salty liquid makes me feel nauseous. If you want to try it, just mix 4 to 5 tablespoon of table salt into a glass of water and drink the mixture. Your body’s natural defense mechanism will reject that much salt and start throwing it out of your stomach. If you’re lucky, just the taste of salt will be enough to make you vomit even before your stomach realizes what you’ve taken. But be warned, there’s danger in taking that much salt at once so only do this if you are really desperate to throw up and no other method is working for you.