The short answer
Medicinal fenugreek use warrants caution with lispro premixes. Severe low-glucose reports involved premixed insulin, but they do not verify lispro protamine or establish how often this exact combination causes harm.
What this answer covers
Authenticated Trigonella foenum-graecum seeds in traditional preparations; ordinary seasoning differs. Humalog75/25 and50/50 contain fixed lispro components.
- Supplement or preparation
- Trigonella foenum-graecum
- Medication ingredient
- insulin lispro protamine, human
The reported outcome was serious
Four patients using fenugreek seeds with premixed insulin reportedly developed hypoglycemic coma. Attribution was possible to probable in this observational report, which supports a cautious review.
The clinical table leaves uncertainty
The table gives aspart or lispro as examples rather than identifying each patient’s insulin. It also contains inconsistent dose-to-weight arithmetic and clinical-outcome descriptions. The report cannot establish a lispro-specific rate or safe dose.
Preparation and amount matter
Federal guidance warns that large fenugreek doses can cause a harmful glucose drop. Traditional medicinal seed use is different from seasoning, and no precise safe amount follows from the case reports.
Use the agreed monitoring plan
Discuss the exact product and amount with the diabetes team and follow your glucose-monitoring and low-glucose treatment plan. Do not change the premix dose yourself. No hour-based separation has been shown to remove a possible glucose interaction.
Evidence and practical considerations
Side effects & toxicity
Indirect premixed-insulin reports and federal large-dose precaution support cautious monitoring, with exact insulin identity and reporting limitations retained.
- Exact scope
- Authenticated Trigonella foenum-graecum seeds in traditional preparations; ordinary seasoning differs. Humalog75/25 and50/50 contain fixed lispro components. with Insulin lispro protamine human RxCUI314684 IN within HumalogMix75/25 or50/50, SC only.
- Medication form and route
- subcutaneous insulin premix; oral supplement
What remains uncertain
- Whole-product evidence does not isolate protamine component; no exact event rate or universal dose change.
Factors that may matter: Fixed ratio; Meals; Product; Dose; Other diabetes treatment.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Adults prescribed the fixed lispro premix
Hypoglycemia can be severe; niacin can reduce glucose lowering. Fixed ratio precludes separate basal/prandial dose adjustments. Inject within15minutes before a meal as labeled.
How this applies: RxCUI314684 IN insulin lispro protamine, human, as component of specified Humalog mixture.
Whole-product evidence does not isolate protamine component, compare every premix or apply to soluble lispro alone. No herb-specific adverse-event rate.
Source 2: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Adults prescribed the fixed lispro premix
Hypoglycemia can be severe; niacin can reduce glucose lowering. Fixed ratio precludes separate basal/prandial dose adjustments. Inject within15minutes before a meal as labeled.
How this applies: RxCUI314684 IN insulin lispro protamine, human, as component of specified Humalog mixture.
Whole-product evidence does not isolate protamine component, compare every premix or apply to soluble lispro alone. No herb-specific adverse-event rate.
Source 3: Original clinical case series
link.springer.com · Source check Sep 10, 2026
Population: Four people using premixed insulin and authenticated fenugreek seeds.
Hypoglycemic coma was reported; the author assessed causality as possible to probable.
How this applies: Indirect for insulin lispro protamine within the labeled Humalog mixtures; original preparation and clinical endpoint retained.
Four observational reports. Clinical table lists aspart or lispro as examples, not verified identity. Dose-to-weight arithmetic and clinical-outcome descriptions have inconsistencies; no exact risk rate or safe dose follows.
Source 4: Federal supplement guidance
nccih.nih.gov · Source check Sep 10, 2026
Population: People taking fenugreek in supplement amounts.
Large doses may cause a harmful drop in blood sugar.
How this applies: Indirect for insulin lispro protamine within the labeled Humalog mixtures; original preparation and clinical endpoint retained.
Large-dose safety guidance is not an exact insulin-lispro-protamine trial or safe-dose threshold.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Prepared exact protamine-lispro ingredient article with fixed-combination and original case-report limits. | |
| Research summary published |
Article revision: f92823d0bd709d59
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.