Spoiled milk is the result of an overgrowth of bacteria that causes changes in taste, smell, and texture. “Typically, if you ingest enough spoiled milk, it can basically take a really, really bad toll on your GI tract,” Dr. Sonpal explains. • Food poisoning can even occur several hours or even several days after drinking the spoiled milk. • In the majority of cases, food poisoning runs its course, and then you go back to normal within a day or two. Generally, as long as the milk smells and looks OK, it’s probably still safe to consume. Is it dangerous to drink spoiled milk? • It all depends on the foodstuff and the condition of your body. Learn more about what makes milk spoil, how to tell if your milk is expired, and the consequences of drinking sour milk. Drinking spoiled milk can lead to a very bad start to the day. What happens if you drink spoiled milk? It can evidently lead to food poisoning. How long after drinking spoiled milk will you get sick But as long as milk has been properly refrigerated, it should be still drinkable up to a week past the date label — and maybe up to two weeks, depending on the temperature of your refrigerator. In some cases, sour milk can cause a mild case of food poising, while in some cases the symptoms are very acute. Thus, one is suggested to smell the milk before gobbling it down or mixing it with tea and … But as long as milk has been properly refrigerated, it should be still drinkable up to a week past the date label — and maybe up to two weeks, depending on the temperature of your refrigerator. A person can start having stomach cramps, nausea, or even a fever. • There are some cases which can be more concerning, though. Milk that has gone past its expiration date begins to develop bacteria that are sometimes harmful to the human body, leading to food poisoning if consumed.