1.   Morphine derivatives or synthetics, such as OxyContin, also can slow down or stop pain signals from being carried to the brain.

2.   There were two positive tests at Sam Houston Race Park in Houston for apomorphine, a morphine derivative.

3.   They had tested positive for a morphine derivative.

4.   Police said she also possessed the painkiller Oxycodone, a morphine derivative, without a prescription.

5.   Police said she also was carrying the painkiller oxycodone, a morphine derivative, without a prescription.

6.   Prosecutors identified the controlled substance Friday as Oxycodone, a morphine derivative.

7.   The first was Fentanyl, a morphine derivative but many times more powerful.

8.   The industry produced morphine derivatives for use in painkillers.