A grandmother from Italy has accidentally poisoned herself , her partner , their son , grandchildren and one of their friends by making them hot chocolate from sachets that was 25 years out of date . The 77-year-old woman , named only as Mrs. Rosetta , from the northeastern town of Vicenza , made the drink after her grandchildren and their friend , aged between nine and 12 , asked for it , making extra cups for her son , her husband and herself . Shortly afterwards , all of them were taken to hospital with stomach upsets and vomiting , which authorities traced to the sachets , which expired in 1990 , according to Il Giornale Di Vicenza . The woman , named as Mrs Rosetta , 77 , was taken to hospital with vomiting and a stomach upset along with her husband , son , two grandchildren , and their young friend . It is thought that Mrs Rosetta bought the drink some time in the late 80s , before the fall of the Berlin Wall and the Tiananmen Square protests , and while Margaret Thatcher was still Prime Minister . The chocolate powder had then laid at the bottom of her cupboard , forgotten , until one day earlier this month when one of her grandchildren asked for it to drink . Discovering the sachets at the back of the cupboard , she promptly mixed it into warm milk and served it , with disastrous results . According to Il Mattino her husband began suffering from vomiting and a stomach upset around an hour after drinking the chocolate , followed by herself , the children , and finally her son . The pensioner , from the town of Vicenza , is thought to have bought the sachets some time in the late 80s - before the fall of the Berlin Wall and while Margaret Thatcher was still Prime Minister . All of them had to be rushed to the emergency room for treatment , with one of the youngsters being kept in for 20 days , reports Corriere Del Veneto . While it appears to have been an accident , the grandmother has been charged with causing injury , with a file passed to prosecutors for consideration . Hot chocolate mix usually contains powdered cocoa and sugar , which do not usually go off but will decrease in quality over time , and powdered milk , which can go off after long periods . Powdered milk is particularly prone to curdling over long periods if exposed to heat or moisture , or if the packaging is torn .
Woman , named as Mrs Rosetta , 77 , made drink using chocolate sachets . Husband , son , two grandchildren and their friend all got food poisoning . Police traced cause to hot chocolate sachets which expired in 1990 . Sachets likely bought in late 80s , while Rosetta was still Prime Minister .