The U.S. Food and Drug Administration said Hospira Inc is voluntarily recalling one lot of its hydromorphone pain relieving injection as it may contain more than the intended fill volume, posing a risk of drug overdose. Overdose of opioid pain medications such as hydromorphone may lead to life-threatening consequences, including slowed breathing, low blood pressure and reduced heart rate, the FDA said. Hospira began the recall on Thursday after a complaint that one Carpuject - the drug delivery system - contained more than the intended 1ml labeled fill volume.