What does “Lonsurf 15 mg 6 14 mg” mean?
“Lonsurf” is the brand name for trifluridine/tipiracil (often written as Lonsurf 15 mg/6.14 mg per tablet). The numbers refer to the fixed tablet strengths:
- 15 mg trifluridine
- 6.14 mg tipiracil
These strengths come in prescription dosing by body surface area (BSA) rather than one-size dosing.
How is Lonsurf dosing usually calculated if the tablet is 15 mg/6.14 mg?
Lonsurf dosing is commonly prescribed in mg/m² (based on BSA). The prescriber then converts that into the number of tablets using the available tablet strengths (including the 15 mg/6.14 mg size) and rounds to fit the regimen.
A typical regimen schedule is based on treatment cycles that repeat every few weeks, but the exact tablet count and schedule depend on the:
- patient’s BSA
- treatment cycle plan provided by the oncologist
- dose reductions if needed
Why do people write “15 mg/6.14 mg” instead of “15 mg”?
Because the tablet contains two drugs in fixed amounts. The tipiracil component is important because it affects how trifluridine is handled in the body, so the dose must keep the ratio in each tablet.
What if someone is trying to interpret a prescription or label?
If your question is about a prescription label like “Lonsurf 15 mg 6 14 mg,” the most accurate interpretation is that it means each tablet contains 15 mg trifluridine and 6.14 mg tipiracil (the standard fixed-dose combination).
If you share the rest of the prescription wording (for example: “take X tablets,” “once or twice daily,” and any cycle schedule), I can help translate how the label maps to the usual dosing approach.
Safety check: don’t substitute strengths
People sometimes confuse Lonsurf with other fluoropyrimidine-like medicines. You should not substitute doses between different brands or strengths. If the label details are unclear, confirm with the pharmacist.
Sources
No sources were provided in your prompt. If you want, tell me your country (or upload the label text), and I can look up the exact tablet strength description and dosing conversion for that region.