Depends on many factors including the predictable or unpredictable variability in pain (baseline or evoked), insurance coverage of medications (or not), reliability of the patient, past history of substance abuse, etc.
The cost of long acting medications can be substantially more than short acting medications. Intermediate acting medications such as methadone are much less expensive but far more hazardous and lethal. Short acting medications are more abused but less often lead to death.
If a patient experiences pain only during physical activity and not at rest, then short acting or low dose intermediate acting meds during the time of physical activity may be appropriate and no opioids during rest. Use of a long acting medication in this circumstance may cause respiratory depression at night and the development of a more rapid tolerance.
If patients have continual uninterrupted pain, then a long acting medication such as Avinza, Exalgo, Butrans, or Duragesic may be appropriate.
Frequently we will prescribe a combination of short and long acting medications and attempt to tailor relief to their pain patterns.
Of course using the lowest dose possible of any of these medications is preferable.