<s>[INST] My sister has just taken 2000mg ibuprofen. Is this classed as an overdose? She is 14 and about 9st. Will this kill her? It s only me and her in the house and I have no one and I really don t know what to do. Im not the cleverest of people and i really need help/advise! Im so scared. Please help. [/INST] Hi, Overdose of ibuprofen may cause damage to the stomach or intestines. Yes, your sister has taken overdose of ibuprofen which can cause severe problems in the gastrointestinal tract such as inflammation, ulcers, bleeding, stomach or intestinal perforation which can be fatal and liver or kidney failure. If you can not access a phone or computer, take her to the nearest emergency room immediately. Do not wait until symptoms start. Some people who overdose on ibuprofen will not show symptoms right away. Hope I have answered your query. Let me know if I can assist you further.  </s>