Ginseng and Glimepiride: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Glimepiride
Ginseng
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
Increased risk of hypoglycemia
Interaction Deep Dive
An interaction between ginseng and antidiabetic agents has not been reported in the literature to date, but is theoretically possible based on the mechanism of action of ginseng. Content of ginseng products has not been consistent5, making adjustment of antidiabetic agents difficult. Studies in patients with diabetes and animal studies suggest that ginseng lowers blood glucose 1426789. A reduction in blood glucose has been shown inpatients without diabetes as well, though these patients have not experienced symptomatic hypoglycemia 13.
Why it happens (mechanism)
Additive hypoglycemic effect
Literature reports
4 reports — tap to read
a) In a randomized, placebo-controlled trial of American ginseng in 10 subjects without diabetes and 9 subjects with Type II diabetes, ginseng significantly lowered blood glucose versus placebo following a glucose challenge. In subjects without diabetes, when American ginseng (3 grams) was given 40 minutes prior to the glucose challenge, blood glucose was significantly lowered at 45 minutes (1.7 +/- 1.2 millimoles/liter (mmol/L) with ginseng versus 2.8 +/- 1.0 mmol/L with placebo) and 60 minutes (0.1 +/- 0.8 mmol/L with ginseng versus 0.8 +/- 1.1 mmol/L with placebo) after the glucose challenge (p less than 0.05). Laboratory reference values were not provided. The change in blood glucose was not significant when ginseng was given at the same time as the glucose challenge. In subjects with Type II diabetes, blood glucose was significantly decreased regardless of the timing of administration of ginseng (p less than 0.05). When ginseng was given at the same time as the glucose challenge, blood glucose at 45 minutes was 4.2 +/- 1.3 mmol/L versus 5.3 +/- 1.3 mmol/L with placebo, and at 60 minutes blood glucose was 3.6 +/- 1.4 mmol/L versus 4.9 +/- 1.5 mmol/L with placebo. When ginseng was given 40 minutes prior to the glucose challenge, blood glucose at 30 minutes was 3.8 +/- 1.2 mmol/L versus 4.8 +/- 0.9 mmol/L with placebo, and at 45 minutes blood glucose was 4.5 +/- 1.1 mmol/L versus 5.3 +/- 1.2 mmol/L with placebo 1.
b) Asian ginseng (Dansk Droge, Copenhagen) taken daily for 8 weeks decreased fasting blood glucose and hemoglobin A1c in a placebo-controlled, double-blind trial of 36 patients newly diagnosed with non-insulin dependent diabetes mellitus (NIDDM). Ginseng 100 mg daily was found to produce a fasting blood glucose average of 7.4 +/- 1.1 millimole/liter (mmol/L) versus 8.3 +/- 1.3 mmol/L in patients administered placebo (p less than 0.05). The difference in blood glucose with ginseng 200 mg daily did not reach statistical significance (7.1 +/- 1.1 mmol/L versus 8.3 +/- 1.3 mmol/L with placebo). Laboratory reference values were not provided. Hemoglobin A1c was also improved with ginseng 200 mg daily, averaging 6.0 +/- 0.3% versus 6.5 +/- 1.7% in patients treated with placebo (p less than 0.05). The authors concluded that ginseng may be a useful adjunct in the management of NIDDM 2.
c) In a study of 12 student nurses (ages 21-27) working the night shift, ginseng (1200 mg Korean ginseng administered in two capsules under double-blind, placebo-controlled conditions for three nights) exerted no clinically significant effect on blood glucose levels, although it did decrease the levels. Specifically, the average blood glucose was 5.2 mmol/L in placebo-treated nurses versus 4.5 mmol/L in ginseng-treated nurses. Laboratory reference values were not provided 3.
d) In a continuation study of 10 subjects with Type 2 diabetes, increased American ginseng doses (up to 9 grams) and alteration of time of administration (from 0 to 120 minutes before glucose challenge) did not affect postprandial glucose to a greater extent than American ginseng 3 grams given 40 minutes prior to glucose challenge 4.
Common questions
Can I take Ginseng and Glimepiride together?
Increased risk of hypoglycemia Always confirm with your pharmacist or prescriber before making any change.
How serious is the Ginseng and Glimepiride interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "delayed". Effects tend to build up gradually over days to weeks.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Ginseng or Glimepiride need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (9)
- Vuksan V, Sievenpiper JL, Koo VY, et al: American ginseng (Panax quinquefolius L.) reduces postpradial glycemia in nondiabetic subjects and subjets with Type 2 diabetes mellitus. Arch Intern Med 2000; 160:1009-1013.
- Sotaniemi EA, Haapakoski E, & Rautio A: Asian ginseng benefits non-insulin dependent diabetics-clinical study. Diabetes Care 1995; 18:1373-1375.
- Hallstrom C, Fulder S, & Carruthers M: Effects of ginseng on the performance of nurses on night duty. Comp Med East West 1982; 6:277-282. DOI
- Vuksan V, Stavro SP, Sievenpiper JL, et al: Similar postprandial glycemic reductions with escalation of dose and administration time of American ginseng in type 2 diabetes. Diabetes Care 2000a; 23(9):1221-1226. PubMed
- Liberti LE & Der Marderosian A: Evaluation of commercial ginseng products. J Pharm Sci 1978; 10:1487-1489. PubMed
- Konno C, Sugiyama K, Kano M, et al: Isolation and hypoglycemic activity of panaxans Q, R, S, T, and U glycans of Panax ginseng roots. J Ethnopharmacol 1985; 14:69-74.
- Oshima Y, Konno CH, & Hikino H: Isolation and hypoglycemic activity of Panaxans I, J, K and L, glycans of Panax ginseng roots. J Ethnopharmacol 1985; 14:255-259. PubMed
- Yokozawa T, Kobayashi T, Oura H, et al: Studies on the mechanism of the hypoglycemic activity of ginsenoside-Rb2 in streptozotocin-diabetic rats. Chem Pharm Bull 1985; 33:869-872. DOI
- Konno C, Sugiyama K, Kano M, et al: Isolation and hypoglycemic activity of panaxans A, B, C, D, and E glycans of Panax ginseng roots. Planta Medica 1984; 50:434-436.
Keep reading about Glimepiride
Keep reading about Ginseng
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