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Opioid Analgesic (Patient-Controlled Analgesia)

Morphine PCA (Burns Pain)

Brand names: Morphine Sulphate PCA

Morphine delivered by patient-controlled analgesia (PCA) is an intravenous opioid regimen used to manage severe background and procedural pain in burns patients, giving the patient control of demand doses within preset limits.

Dosing — being independently re-sourced

ClinCalc Pro is rebuilding its dose data from primary open sources — the manufacturer SmPC (eMC), the WHO Model Formulary and other official references — under clinician review. This drug's structured dose is not yet published here. Confirm all doses against the product SmPC and your local formulary before prescribing.

Clinical monograph

How it works

Morphine is an agonist at mu-opioid receptors in the central nervous system, modulating ascending nociceptive transmission and the affective response to pain.

Prescribing in practice

  • Respiratory depression is the principal hazard, so use standardised PCA settings with appropriate lockout and observation, and ensure naloxone and monitoring are immediately available.
  • Only the patient should activate the demand button; carer or staff-activated dosing bypasses an inherent safety feature and must be avoided.
  • Account for active metabolites in renal impairment and for interactions with other sedatives, prescribing per current prescribing references and acute pain protocols.

Monitoring

Monitor sedation score, respiratory rate, oxygen saturation and pain scores regularly while PCA is in use, with escalation criteria defined locally.

Counselling the patient

  • Explain that the patient presses the button when in pain and that built-in limits prevent over-delivery.
  • Stress that family or staff must never press the button for the patient.
  • Advise reporting excessive drowsiness, nausea or constipation to the team.

Evidence & guidelines

Opioid PCA is standard practice for severe burns and acute pain, governed by acute pain service protocols and current prescribing references emphasising sedation and respiratory monitoring.

Reference: BBA pain management guidelines; RCoA PCA standards; Confirm identity and dosing against the manufacturer SPC (eMC) and NICE. Verify against your local formulary and current prescribing references before prescribing. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.

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