One of the primary concerns of a person who has suffered a spinal cord injury is to get their pain under control. The desire to do this might be something that is addressed with the doctors who are caring for the patient. A recent study from the Texas A & M College of Medicine found that doctors giving a patient morphine too soon after a spinal cord injury could do more harm than good.
The study found that the method of administration didn't have any impact on the effect of the drug on the injury. The issue at hand seems to be how morphine impacts the recovery of locomotive function.