NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated July 13, 2026

Morphine

Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

The prototypical opioid analgesic, morphine is used for the management of severe pain when non-opioid alternatives are inadequate. It is the standard against which other opioids are compared. Available in immediate- and extended-release oral formulations, IV, IM, and intrathecal preparations, morphine is essential in cancer pain management and palliative care.

Evidence tier
Strong
Indexed sources
10 2019–2025
Interactions
0
Category
Prescription
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Publication status

Exploratory record, not a reviewed medical publication.

See the editorial and medical-review policies for the publication gate.

This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

The prototypical opioid analgesic, morphine is used for the management of severe pain when non-opioid alternatives are inadequate. NutriStack rates the supporting evidence as strong. Common adult dosing is IR: 15–30 mg every 4 hours as needed; ER: 15–30 mg every 8–12 hours initially (individualized titration) (as prescribed by your physician), though a prescriber sets the actual dose. This profile indexes 10 sources.

What it's good for
  • Effective relief of severe pain3,5
  • Gold standard for cancer pain management9,3
  • Multiple routes of administration (oral, IV, IM, intrathecal, epidural)4,9
  • Extended-release formulations for around-the-clock pain control
What to watch for
  • Constipation (nearly universal)
  • Nausea and vomiting
  • Drowsiness and sedation
  • Significant respiratory depression
  • Acute or severe bronchial asthma in unmonitored settings7

The bottom line

Evidence rating strong. Most-documented uses: effective relief of severe pain, gold standard for cancer pain management, multiple routes of administration (oral, iv, im, intrathecal, epidural). 10 sources indexed (2019–2025), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Acts as a full agonist at mu-opioid receptors (primary analgesic effect) and kappa-opioid receptors in the central nervous system. Mu-receptor activation in the periaqueductal gray, rostral ventromedial medulla, and dorsal horn of the spinal cord inhibits ascending pain transmission and activates descending inhibitory pathways. Also produces sedation, euphoria, respiratory depression, and reduced GI motility.8,10

Class
Opioid Analgesic
Dosing

Dosing & protocol.

Common range
IR: 15–30 mg every 4 hours as needed; ER: 15–30 mg every 8–12 hours initially (individualized titration) (as prescribed by your physician)
Recommended form
Immediate-release tablet/solution or extended-release tablet/capsule

Oral bioavailability is 20–40% due to extensive first-pass hepatic metabolism; ER formulations must be swallowed whole

Safety

Full safety detail.

Side effects

  • Constipation (nearly universal)
  • Nausea and vomiting
  • Drowsiness and sedation
  • Respiratory depression
  • Pruritus
  • Urinary retention
  • Hypotension
  • Physical dependence, tolerance, and addiction

Contraindications

  • Significant respiratory depression
  • Acute or severe bronchial asthma in unmonitored settings7
  • Known or suspected GI obstruction (paralytic ileus)
  • Known hypersensitivity to morphine1,2
  • Concurrent use of MAO inhibitors or within 14 days
  • Opioid-naive patients for ER formulation initiation8,10
Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Meta-analyses & systematic reviews

7

Reference material

3
FAQ

Common questions.

Quick answers about Morphine, drawn from the data on this page.

What is Morphine?

The prototypical opioid analgesic, morphine is used for the management of severe pain when non-opioid alternatives are inadequate. It is the standard against which other opioids are compared. Available in immediate- and extended-release oral formulations, IV, IM, and intrathecal preparations, morphine is essential in cancer pain management and palliative care.

What is Morphine used for?

Commonly cited benefits of Morphine include: Effective relief of severe pain; Gold standard for cancer pain management; Multiple routes of administration (oral, IV, IM, intrathecal, epidural); Extended-release formulations for around-the-clock pain control. NutriStack rates the overall evidence as strong.

What is a typical dose of Morphine?

A typical adult dose of Morphine is IR: 15–30 mg every 4 hours as needed; ER: 15–30 mg every 8–12 hours initially (individualized titration) (as prescribed by your physician). The commonly recommended form is Immediate-release tablet/solution or extended-release tablet/capsule. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Morphine?

Reported side effects include constipation (nearly universal), nausea and vomiting, drowsiness and sedation, respiratory depression, pruritus, urinary retention. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Morphine?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Morphine in NutriStack.

Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.

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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.