Review the approximate opioid-equivalence arithmetic for an entered IV morphine amount and optional percentage reduction. This is not a dosing tool.
Enter a positive IV morphine amount and its unit.
These outputs reproduce a simplified model, not patient-specific equianalgesic doses. Opioid equivalence varies by source, route, formulation, prior exposure, and patient factors. Do not use this page to make treatment decisions; consult a qualified clinician or pharmacist.
Explore the arithmetic of an opioid-equivalence model and an entered reduction for incomplete cross-tolerance.
Opioid conversions vary by source, administration method, patient and drug. This page must never be used to select or change a dose.
Use the opioid conversion reference as a transparent arithmetic check. Keep the original values beside the answer so another reader can see what was included and what was left out.
The opioid conversion reference rejects values that make its formula undefined. Do not type symbols or unit names inside a numeric field.
| Input | What it means |
|---|---|
| Incomplete cross tolerance | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Morphine (IV) | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
A hypothetical equivalent value of 100 reduced by 25% becomes 75 before any clinical decisions.
Practical check: An entry of 10 mg IV morphine with no reduction produces the page’s listed approximate equivalents.
Work through that example before entering your own figures. It is an easy way to catch a wrong field, unit or percentage format.
Use the calculation to make the method and its inputs easier to check with a healthcare professional. Its meaning depends on the clinical setting and on whether the underlying method is appropriate for that person.
Opioid conversions vary by source, administration method, patient and drug. This page must never be used to select or change a dose.
Read the result with its unit, period and denominator. A percentage without its base, or a money figure without its currency and period, is easy to misunderstand.
Try changing one input at a time. A realistic low and high case often tells you more than a single answer shown with many decimal places.
Round at the end. Long decimals from a calculator do not make a measured, estimated or accounting input more precise.
If another source disagrees, compare the exact definition and formula first. Similar names may hide different standards, timing rules or included items.
For decisions involving health, safety, regulation, contracts or substantial money, check the original source and consult an appropriately qualified person.
A useful review note for the opioid conversion reference includes the date, input source, selected units and final rounded value. This takes only a moment and prevents a bare result from being mistaken for a fresh measurement or a broader conclusion.
The worked example is intentionally simple. Real records may contain adjustments, missing values or definitions that the form cannot infer. Resolve those questions before entering a number rather than trying to explain an unsuitable result afterward.
Before sharing this result, read it once without the surrounding page. If the unit, time period, base value and purpose are not obvious, add them. Clear labels are more useful than extra digits and make the calculation easier to verify.
For the opioid page, keep the worked example nearby while checking your own entry. It provides a quick reference for the expected scale and display format.
The opioid conversion reference applies the formula described above to the values entered on this page.
Opioid conversions vary by source, administration method, patient and drug. This page must never be used to select or change a dose.
Repeat the worked example first. For opioid conversion reference, it should agree with this check: An entry of 10 mg IV morphine with no reduction produces the page’s listed approximate equivalents.
It may use another definition, factor, period or rounding rule. This page has this specific limit: Opioid conversions vary by source, administration method, patient and drug. This page must never be used to select or change a dose.
Keep working digits during the arithmetic, then round the opioid conversion reference answer to match the precision of the input values.
Zero is accepted where it has a real meaning, but the opioid conversion reference rejects a zero divisor or another value that makes the formula undefined.
Use the opioid conversion reference to check arithmetic. Review the underlying records and obtain suitable professional advice when the decision has serious consequences.