Caraway

Metadata

• Common Names: Caraway (English); Kummel (German)
• Botanical Name: Carum carvi L.
• Plant Family: Apiaceae (Umbelliferae)
• Part Used: Fruit/seed (Carvi fructus); Essential oil (Carvi aetheroleum)
• Evidence Quality Rating: Moderate (primarily studied in combination with peppermint oil)

Approved Indications

Commission E

• Dyspeptic complaints
• Bloating / Flatulence
• Fullness
• Mild gastrointestinal spasms

ESCOP

• Spasmodic gastrointestinal disorders
• Flatulence and bloating
• Dyspeptic complaints
• Roemheld syndrome (gastrocardiac syndrome)

EMA/HMPC

• Traditional use (fruit): Relief of minor digestive complaints including bloating and flatulence
• Traditional use (oil): Symptomatic relief of digestive disorders such as bloating, flatulence, and mild spasmodic GI complaints
• The HMPC conclusions are based on traditional use: “although there is insufficient evidence from clinical trials, the effectiveness of these herbal medicines is plausible and there is evidence that they have been used safely in this way for at least 30 years”

Agreement/Disagreement Between Bodies

• All three bodies are in close agreement: dyspepsia, bloating, flatulence, and mild GI spasms
• ESCOP uniquely includes Roemheld syndrome (gastrocardiac syndrome — gastric distension causing cardiac symptoms)
• None grant “well-established use” status for caraway as a monotherapy
• The peppermint-caraway combination has stronger evidence than caraway alone
• EMA limits to traditional use classification

Conditions Treated

• Functional dyspepsia
• Bloating / Flatulence
• Mild gastrointestinal spasms
• Feelings of fullness
• Roemheld syndrome / Gastrocardiac syndrome
• Infantile colic (traditional, in combination)

Mechanism of Action

• Carvone (50-65% of essential oil): Primary antispasmodic constituent; inhibits acetylcholine-induced smooth muscle contraction in a dose-dependent manner; blocks calcium influx into smooth muscle cells
• Limonene (20-40% of essential oil): Contributing antispasmodic and carminative effects; modulates prostaglandin synthesis
• Smooth muscle relaxation: Caraway extract reduces the response of intestinal smooth muscle cells to acetylcholine, demonstrated in guinea pig ileum models
• Carminative effect: Reduces surface tension of gas bubbles in the GI tract; promotes gas expulsion
• Antimicrobial activity: Carvone has demonstrated activity against gastrointestinal pathogens
• Motility modulation: May enhance gastric motility while reducing intestinal spasm, a beneficial dual effect for dyspepsia

Clinical Evidence Summary

Peppermint-Caraway Combination (Enteroplant)

• May et al. (1996): Double-blind RCT comparing peppermint oil (90mg) + caraway oil (50mg) combination with placebo in functional dyspepsia; significant superiority of the combination for pain reduction and global symptom improvement
• Madisch et al. (1999): RCT comparing peppermint/caraway combination to cisapride (standard prokinetic); comparable efficacy for functional dyspepsia symptom relief; the herbal combination was as effective as the pharmaceutical prokinetic
• Rich et al. (2017): RCT of novel duodenal-release formulation of caraway oil + L-menthol in functional dyspepsia; significant improvement in epigastric pain syndrome and postprandial distress syndrome
• Multiple RCTs consistently show the peppermint-caraway combination significantly reduces feelings of fullness, pain, and mild GI spasms over 4 weeks of treatment

Caraway Monotherapy

• Clinical evidence for caraway as a single agent is much more limited
• Pharmacological data (smooth muscle relaxation, antimicrobial activity) is supportive but human RCT data for monotherapy is sparse
• The EMA assessment noted insufficient clinical trial evidence for monotherapy, hence traditional use status

Sample Sizes

• Most combination trials: n=60-220 patients
• Treatment duration: typically 4-8 weeks

European vs US/Anglophone Consensus

• Caraway is a foundational carminative in German phytotherapy; widely used in traditional German medicine and cuisine
• The peppermint-caraway combination (Enteroplant) is a well-established pharmacy product in Germany but virtually unknown in US clinical practice
• US practitioners rarely consider caraway as a therapeutic agent; it is primarily viewed as a culinary spice
• The concept of Roemheld syndrome (gastrocardiac syndrome) treated with carminatives like caraway is a distinctly German clinical concept
• European pediatricians sometimes recommend caraway-based preparations for infantile colic; this practice is not common in US pediatrics

Safety Profile

Contraindications

• Pregnancy: Possibly unsafe; caraway oil has been traditionally used to start menstruation and may cause miscarriage
• Cholecystitis: Avoid in active gallbladder inflammation
• Hepatic damage: Use with caution in liver disease
• Known allergy to Apiaceae family (celery, fennel, anise, dill)

Drug Interactions

• May increase absorption of iron supplements
• May increase absorption and effects/side effects of isoniazid
• May lower blood sugar: caution with antidiabetic medications (dose adjustment may be needed)
• No known severe drug interactions

Side Effects

• Generally well tolerated at recommended doses
• Burping, heartburn, and nausea (when used in combination with peppermint oil)
• Contact dermatitis (skin application, rare)
• Allergic reactions in Apiaceae-sensitive individuals (rare)

Pregnancy/Lactation

• Caraway oil is possibly unsafe during pregnancy (emmenagogue/abortifacient concerns)
• Insufficient data for breastfeeding safety; traditionally considered a galactagogue in some European cultures
• Not recommended for children under 4 years without medical supervision

Clinical Dosage

Forms and Ranges

• Caraway fruit (crushed): 1.5-6 g daily in divided doses as infusion
• Caraway oil: 3-6 drops (0.05-0.2 mL) daily, or 1-2 drops on a sugar cube after meals
• Infusion: 1-2 teaspoons (2-5 g) freshly crushed caraway seeds in 150 mL boiling water, steeped 10-15 minutes, 2-3 times daily

Peppermint-Caraway Combination

• Enteroplant: 90 mg peppermint oil + 50 mg caraway oil per enteric-coated capsule; 1 capsule 2-3 times daily before meals for up to 4 weeks

Key Standardized Products

• Enteroplant (peppermint/caraway combination, Germany)
• Carvi fructus preparations per European Pharmacopoeia (minimum 3% essential oil)
• Various German pharmacy caraway oil preparations

Sources

• EMA/HMPC Assessment Report on Carum carvi L., fructus and aetheroleum
• EMA/HMPC Herbal Monograph on Carum carvi L., fructus; Carum carvi L., aetheroleum
• Commission E Monograph: Carvi fructus; Carvi aetheroleum
• ESCOP Monograph: Carvi fructus; Carvi aetheroleum (2019)
• May B, et al. Efficacy of a fixed peppermint oil/caraway oil combination in non-ulcer dyspepsia. Arzneim-Forsch/Drug Res. 1996;46:1149-1153
• Madisch A, et al. Treatment of functional dyspepsia with a herbal preparation. Digestion. 1999;60:1-31
• Rich G, et al. A randomized placebo-controlled trial on the effects of Menthacarin, a proprietary peppermint- and caraway-oil-preparation, on symptoms and quality of life in patients with functional dyspepsia. Neurogastroenterol Motil. 2017;29(11):e13132
• Mahboubi M. Caraway as important medicinal plants in management of diseases. Nat Prod Bioprospect. 2019;9(1):1-11

Connections

• Primarily studied in combination with Peppermint (Enteroplant)
• Component of STW 5/Iberogast multi-herb combination
• Related to Fennel as fellow Apiaceae family carminatives
• Compare with German Chamomile for overlapping antispasmodic indications