Four nursing homes have been fined more than $1,000 each in connection with several incidents that included a resident drug overdose and two residents suffering broken bones. Cambridge Manor of Fairfield was fined $1,380 on July 31, in connection with two incidents at the home, according to a citation by the state Department of Public Health. In the first incident, on July 3, a resident was admitted to a hospital as unresponsive and suffering an overdose of opiates, the citation states. A DPH investigation determined that the resident had been given morphine and thyroid medicine by mistake, according to the citation. William Gerrish, DPH’s spokesman, said the resident recovered and returned to Cambridge Manor. In the second incident, on July 12, a resident with anxiety and dementia was left unattended in a wheelchair in the lobby, the citation said.