How Long Does Ginger Take to Work? By Symptom

Ginger lowered pregnancy nausea from day 1 in one trial¹, and more migraine patients were pain-free at 2 hours². Period-pain trials dosed for 3 to 4 days³; joint pain and blood sugar were tested over 6 to 12 weeks^{4, 5}. Blood levels peak at about 1 hour^{6, 7}, which is not relief.

These timelines come from clinical trials, many of them small. For what ginger does overall and the doses studied, see its evidence page.

Ginger's main active compounds, the gingerols and shogaols, reach their highest blood level about 1 hour after a dose. In 27 volunteers given 100 mg to 2 g, most of the compounds circulated as conjugates (the form the liver prepares for removal), with peak times of about 66 to 75 minutes at the 2 g dose⁷.

• Capsule or extract: after 2 g of ginger extract, the peak came at 1 hour and the half-lives were 1 to 3 hours. Nothing built up after repeated daily dosing⁶.
• Tea: in a pilot study of 2 volunteers, gingerols peaked 30 to 60 minutes after ginger tea⁸.
• Stomach emptying: 1.2 g of ginger roughly halved the gastric half-emptying time in 24 healthy volunteers (13.1 vs 26.7 minutes)⁹. In 11 people with functional dyspepsia it also sped emptying (12.3 vs 16.1 minutes) but did not change their symptoms¹⁰.
• A null result: 1 g of powdered ginger had no effect on emptying in 16 healthy volunteers¹¹.

Because the compounds clear within hours, they do not stay in the blood long. A change in the gut within the hour is also not the same as symptom relief. The sections below give the time each symptom was actually measured at.

Nausea relief was judged over hours to days, and the answer depends on the cause.

Pregnancy nausea

• Onset: in 120 women with morning sickness, 125 mg of ginger extract four times a day (equal to 1.5 g of dried ginger) gave lower nausea scores than placebo after the first day, and the gap held on each of 4 days. Vomiting was not significantly changed¹.
• Another trial: 1 g a day for 4 days in 70 women lowered nausea and vomiting episodes versus placebo¹².
• Pooled evidence: a meta-analysis of 12 trials in 1,278 women found less nausea (mean difference 1.20, 95% CI 0.56 to 1.84) but no significant effect on vomiting. Subgroup analyses seemed to favor under 1,500 mg a day, and the evidence was graded low quality¹³.

Chemotherapy and surgery

• Chemotherapy: in a review of 18 articles, ginger at 1 g a day or less for more than 3 days cut the odds of acute vomiting by 60% in a subgroup (odds ratio 0.4; 3 studies, 301 participants). The review found no significant link with overall or delayed vomiting, or with nausea likelihood or severity¹⁴. The National Center for Complementary and Integrative Health (NCCIH) calls ginger's added value to standard anti-nausea treatment for chemotherapy uncertain¹⁵.
• After surgery: a meta-analysis of 14 trials in 1,506 patients found lower nausea scores than placebo at 2, 6 and 12 hours, but no significant difference in vomiting, combined nausea and vomiting, or antiemetic use¹⁶. An older meta-analysis of 5 trials in 363 patients found a relative risk of 0.69 for postoperative nausea and vomiting with at least 1 g¹⁷. The reviews disagree, and the NCCIH calls the benefit after surgery uncertain¹⁵.

Motion sickness

Results conflict. In 13 volunteers with a history of motion sickness, 1,000 and 2,000 mg before spinning reduced nausea and delayed its onset¹⁸. In 28 volunteers, 500 to 1,000 mg gave no protection¹⁹. The NCCIH says most motion sickness studies have not shown a benefit¹⁵.

For the full evidence on ginger for nausea, see that page. The other common choice in pregnancy, vitamin B6, is covered in our guide to vitamin B6 and Unisom. Versus vitamin B6, ginger did not carry a significantly higher miscarriage risk (relative risk 0.49, 95% CI 0.17 to 1.42)¹³.

The migraine trials checked pain at 2 hours, so they show where patients stood at that point, not when relief began. A meta-analysis of 3 randomized trials found more patients pain-free at 2 hours on ginger than on control (risk ratio 1.79, 95% CI 1.04 to 3.09). The interval is wide, and the review found no clear effect on overall treatment response (risk ratio 2.04, 95% CI 0.35 to 11.94)².

In 100 patients with acute migraine without aura, ginger powder and sumatriptan both lowered mean headache severity at 2 hours, with similar results and fewer side effects on ginger. That trial had no placebo group, so it cannot show how much of the drop came from ginger²⁰. Our page on migraine covers the wider evidence.

Muscle-soreness trials gave ginger for days, not hours. In two placebo-controlled studies of 34 and 40 volunteers, 2 g a day of raw or heat-treated ginger for 11 days lowered pain 24 hours after hard elbow exercise by 25% and 23%²¹.

A shorter course did not change pain. In 20 participants, 4 g of ginger over a 5-day supplementation period left soreness scores unchanged, though strength came back sooner at 48 hours²². A systematic review of 7 analgesic studies concluded that roughly 2 g a day may modestly reduce muscle pain, particularly when taken for at least 5 days, and that 1 to 2 weeks of ginger may reduce pain from hard exercise²³. See muscle soreness for related options.

In period-pain trials, ginger was taken for 3 to 4 days from the start of the period. A meta-analysis pooled four placebo-controlled trials that dosed during the first 3 to 4 days of the cycle and found lower pain scores, with 750 to 2,000 mg of ginger powder used across studies³.

In 150 students, 250 mg four times a day for 3 days from the start of the period relieved pain about as well as mefenamic acid or ibuprofen, judged after one period. That trial had no placebo group²⁴. The NCCIH reports that ginger supplements might help with menstrual cramps¹⁵.

Joint pain is the slowest of the pain uses. The trials ran 6 to 8 weeks^{4, 25}, and the results are modest and inconsistent.

• 6 weeks: in 247 evaluable people with knee osteoarthritis (261 enrolled), 63% on a concentrated extract of two ginger species had a meaningful pain reduction versus 50% on placebo (P = 0.048). Gastrointestinal side effects, mostly mild, affected 59 patients on ginger versus 21 on placebo⁴.
• 8 weeks, no benefit: 1 g a day of powdered ginger did not improve knee pain or function in 60 people²⁵.
• Pooled: 5 trials in 593 patients found a small pain reduction (standardized mean difference -0.30) and a higher chance of stopping treatment (risk ratio 2.33)²⁶.

See ginger for arthritis symptoms and the page on osteoarthritis.

The blood-sugar trials ran 10 to 12 weeks^{27, 5}. The inflammation abstracts did not report trial lengths, so they say little about how fast markers fall.

• Inflammation markers: a meta-analysis of 9 studies found C-reactive protein (CRP) lower by 0.84 mg/L, and the change did not depend on dose²⁸. Another pooled 16 trials in 1,010 people and found lower CRP and tumor necrosis factor-alpha but no change in interleukin-6. Results varied widely between trials²⁹. See inflammation, and our guide to ginger and turmeric shots for the combination.
• Blood sugar: 2,000 mg a day for 10 weeks lowered fasting glucose and HbA1c in 45 people with type 2 diabetes (HbA1c -0.38% vs +0.22% on placebo)²⁷. A 12-week trial of 1,600 mg a day in 70 patients also lowered both⁵. A meta-analysis of 10 studies in 490 people with type 2 diabetes or metabolic syndrome found HbA1c lower by a mean difference of -1.00 (95% CI -1.56 to -0.44, units as reported)³⁰. See type 2 diabetes.
• Weight: 27 trials in 1,309 adults found body weight lower by 1.52 kg and waist circumference by 1.04 cm. Certainty was low to very low, and the effective dose was 2 g a day for longer than 8 weeks³¹. See belly fat reduction.

Use the time window the trials used for your goal:

• Migraine: check at 2 hours, as the trials did².
• Pregnancy nausea: judge over 4 days. Differences appeared from day 1 in the trial that checked daily¹.
• Period cramps: start with the period. The trials dosed for 3 to 4 days and judged the result over one period^{3, 24}.
• Muscle soreness: allow 1 to 2 weeks of daily dosing. An 11-day course showed a pain benefit and a 5-day course did not^{23, 21, 22}.
• Knee osteoarthritis: the trials used 6 to 8 weeks, with inconsistent results^{4, 25}.
• Blood sugar: allow 10 to 12 weeks, with a clinician tracking your results^{27, 5}.

If nothing has changed by the end of the window, the trials do not support continuing. Stop, or ask a clinician about alternatives. Persistent vomiting in pregnancy, or being unable to keep fluids down, needs a clinician rather than a home trial of ginger.

Ginger can cause abdominal discomfort, heartburn, diarrhea and mouth or throat irritation when taken by mouth. The NCCIH advises anyone taking medicine to talk with a health care provider before using herbal products¹⁵.

• Blood thinners: the evidence conflicts. In 12 healthy men given a single 25 mg dose of warfarin, 7 days of ginger did not change INR or warfarin clearance³². In a 2019 case report, a patient on warfarin started a 48 mg daily ginger chew and her INR rose from 2.7 to 8.0, then returned to 2.6 after the ginger was stopped and 3 warfarin doses were held³³. One case cannot prove cause, so tell your prescriber, and see blood thinners and supplements.
• Glucose-lowering medicine: ginger lowered fasting glucose in the diabetes trials above, so people on such medicine should mention it to their prescriber²⁷.
• Pregnancy and breastfeeding: ginger supplements may be safe in pregnancy, and little is known about breastfeeding¹⁵. Versus placebo, the pooled miscarriage risk was not significant (relative risk 3.14), but the interval was very wide (0.65 to 15.11)¹³.
• Kidney or liver disease: we did not find trials in these groups, so ask your clinician first.

We searched PubMed through a research-paper index for ginger trials, meta-analyses and pharmacokinetic studies, covering nausea, migraine, muscle pain, period pain, osteoarthritis, inflammation, blood sugar, weight and drug interactions. We read the PubMed abstracts of 32 papers and the NIH NCCIH fact sheet, and cited all of them. An independent reviewer then checked the draft against those sources and the full text of the warfarin case report.

We prioritized systematic reviews and randomized trials in adults. Most abstracts reported the trial length but not the exact moment relief began, so the timelines show when effects were measured, not proof that nothing happened earlier. Many trials were small and used different ginger products. Researched on 2 November 2026.

1. Willetts KE, et al. Effect of a ginger extract on pregnancy-induced nausea: a randomised controlled trial. Aust N Z J Obstet Gynaecol. 2003;43(2):139-44. doi:10.1046/j.0004-8666.2003.00039.x
2. Chen L, et al. The efficacy of ginger for the treatment of migraine: A meta-analysis of randomized controlled studies. Am J Emerg Med. 2021;46:567-571. doi:10.1016/j.ajem.2020.11.030
3. Daily JW, et al. Efficacy of Ginger for Alleviating the Symptoms of Primary Dysmenorrhea: A Systematic Review and Meta-analysis of Randomized Clinical Trials. Pain Med. 2015;16(12):2243-55. doi:10.1111/pme.12853
4. Altman RD, et al. Effects of a ginger extract on knee pain in patients with osteoarthritis. Arthritis Rheum. 2001;44(11):2531-8. doi:10.1002/1529-0131(200111)44:11<2531::aid-art433>3.0.co;2-j Our study summary.
5. Arablou T, et al. The effect of ginger consumption on glycemic status, lipid profile and some inflammatory markers in patients with type 2 diabetes mellitus. Int J Food Sci Nutr. 2014;65(4):515-20. doi:10.3109/09637486.2014.880671
6. Yu Y, et al. Examination of the pharmacokinetics of active ingredients of ginger in humans. AAPS J. 2011;13(3):417-26. doi:10.1208/s12248-011-9286-5
7. Zick SM, et al. Pharmacokinetics of 6-gingerol, 8-gingerol, 10-gingerol, and 6-shogaol and conjugate metabolites in healthy human subjects. Cancer Epidemiol Biomarkers Prev. 2008;17(8):1930-6. doi:10.1158/1055-9965.EPI-07-2934
8. Schoenknecht C, et al. Quantitation of Gingerols in Human Plasma by Newly Developed Stable Isotope Dilution Assays and Assessment of Their Immunomodulatory Potential. J Agric Food Chem. 2016;64(11):2269-79. doi:10.1021/acs.jafc.6b00030
9. Wu KL, et al. Effects of ginger on gastric emptying and motility in healthy humans. Eur J Gastroenterol Hepatol. 2008;20(5):436-40. doi:10.1097/MEG.0b013e3282f4b224 Our study summary.
10. Hu ML, et al. Effect of ginger on gastric motility and symptoms of functional dyspepsia. World J Gastroenterol. 2011;17(1):105-10. doi:10.3748/wjg.v17.i1.105 Our study summary.
11. Phillips S, et al. Zingiber officinale does not affect gastric emptying rate. A randomised, placebo-controlled, crossover trial. Anaesthesia. 1993;48(5):393-5. doi:10.1111/j.1365-2044.1993.tb07011.x
12. Vutyavanich T, et al. Ginger for nausea and vomiting in pregnancy: randomized, double-masked, placebo-controlled trial. Obstet Gynecol. 2001;97(4):577-82. doi:10.1016/s0029-7844(00)01228-x
13. Viljoen E, et al. A systematic review and meta-analysis of the effect and safety of ginger in the treatment of pregnancy-associated nausea and vomiting. Nutr J. 2014;13:20. doi:10.1186/1475-2891-13-20 Our study summary.
14. Crichton M, et al. Efficacy of Ginger (Zingiber officinale) in Ameliorating Chemotherapy-Induced Nausea and Vomiting and Chemotherapy-Related Outcomes: A Systematic Review Update and Meta-Analysis. J Acad Nutr Diet. 2019;119(12):2055-2068. doi:10.1016/j.jand.2019.06.009
15. National Center for Complementary and Integrative Health. Ginger: Usefulness and Safety. https://www.nccih.nih.gov/health/ginger
16. Lu C, et al. The preventive and relieving effects of ginger on postoperative nausea and vomiting: A systematic review and meta-analysis of randomized controlled trials. Int J Nurs Stud. 2022;125:104094. doi:10.1016/j.ijnurstu.2021.104094
17. Chaiyakunapruk N, et al. The efficacy of ginger for the prevention of postoperative nausea and vomiting: a meta-analysis. Am J Obstet Gynecol. 2006;194(1):95-9. doi:10.1016/j.ajog.2005.06.046
18. Lien HC, et al. Effects of ginger on motion sickness and gastric slow-wave dysrhythmias induced by circular vection. Am J Physiol Gastrointest Liver Physiol. 2003;284(3):G481-9. doi:10.1152/ajpgi.00164.2002
19. Stewart JJ, et al. Effects of ginger on motion sickness susceptibility and gastric function. Pharmacology. 1991;42(2):111-20. doi:10.1159/000138781
20. Maghbooli M, et al. Comparison between the efficacy of ginger and sumatriptan in the ablative treatment of the common migraine. Phytother Res. 2014;28(3):412-5. doi:10.1002/ptr.4996
21. Black CD, et al. Ginger (Zingiber officinale) reduces muscle pain caused by eccentric exercise. J Pain. 2010;11(9):894-903. doi:10.1016/j.jpain.2009.12.013
22. Matsumura MD, et al. The Effects of Pre-Exercise Ginger Supplementation on Muscle Damage and Delayed Onset Muscle Soreness. Phytother Res. 2015;29(6):887-93. doi:10.1002/ptr.5328
23. Wilson PB. Ginger (Zingiber officinale) as an Analgesic and Ergogenic Aid in Sport: A Systemic Review. J Strength Cond Res. 2015;29(10):2980-95. doi:10.1519/JSC.0000000000001098
24. Ozgoli G, et al. Comparison of effects of ginger, mefenamic acid, and ibuprofen on pain in women with primary dysmenorrhea. J Altern Complement Med. 2009;15(2):129-32. doi:10.1089/acm.2008.0311
25. Niempoog S, et al. The efficacy of powdered ginger in osteoarthritis of the knee. J Med Assoc Thai. 2012;95 Suppl 1:S59-64. https://pubmed.ncbi.nlm.nih.gov/23964445/
26. Bartels EM, et al. Efficacy and safety of ginger in osteoarthritis patients: a meta-analysis of randomized placebo-controlled trials. Osteoarthritis Cartilage. 2015;23(1):13-21. doi:10.1016/j.joca.2014.09.024 Our study summary.
27. Makhdoomi Arzati M, et al. The Effects of Ginger on Fasting Blood Sugar, Hemoglobin A1c, and Lipid Profiles in Patients with Type 2 Diabetes. Int J Endocrinol Metab. 2017;15(4):e57927. doi:10.5812/ijem.57927
28. Mazidi M, et al. The effect of ginger supplementation on serum C-reactive protein, lipid profile and glycaemia: a systematic review and meta-analysis. Food Nutr Res. 2016;60:32613. doi:10.3402/fnr.v60.32613
29. Morvaridzadeh M, et al. Effect of ginger (Zingiber officinale) on inflammatory markers: A systematic review and meta-analysis of randomized controlled trials. Cytokine. 2020;135:155224. doi:10.1016/j.cyto.2020.155224
30. Zhu J, et al. Effects of Ginger (Zingiber officinale Roscoe) on Type 2 Diabetes Mellitus and Components of the Metabolic Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Evid Based Complement Alternat Med. 2018;2018:5692962. doi:10.1155/2018/5692962
31. Rafieipour N, et al. Ginger intervention on body weight and body composition in adults: a GRADE-assessed systematic review and dose-response meta-analysis of 27 randomized controlled trials. Nutr Rev. 2024;82(12):1651-1665. doi:10.1093/nutrit/nuad149
32. Jiang X, et al. Effect of ginkgo and ginger on the pharmacokinetics and pharmacodynamics of warfarin in healthy subjects. Br J Clin Pharmacol. 2005;59(4):425-32. doi:10.1111/j.1365-2125.2005.02322.x
33. Rubin D, et al. Effects of Oral Ginger Supplementation on the INR. Case Rep Med. 2019;2019:8784029. doi:10.1155/2019/8784029