Convolvulus arvensis

Convolvulus arvensis contains convolvulin, a resinous glycoside that acts as a stimulant laxative by irritating the intestinal lining and promoting peristalsis. The herb also contains scopoletin and caffeic acid, which contribute to its choleretic effects—stimulating bile production and flow from the gallbladder. These combined actions support digestive elimination and liver function. Evidence level: C (based on traditional use and preliminary pharmacological studies).

Convolvulus arvensis may interact with oral medications due to its laxative effects, which can accelerate gut transit time and reduce drug absorption. Its choleretic properties may alter how the liver processes certain medications. Patients taking diuretics, heart medications, or other laxatives should use caution. Evidence level: C. Always consult a healthcare provider before combining this herb with prescription medications.

The traditional adult dosage for Convolvulus arvensis root is 2-3 grams prepared as a tea, taken twice daily. Steep the dried root in hot water for 10-15 minutes before straining. Due to its stimulant laxative properties, start with a lower dose to assess individual tolerance. Do not exceed recommended amounts. Evidence level: C. Consult a qualified herbalist for personalized dosing guidance.

No, Convolvulus arvensis is unsafe during pregnancy and is contraindicated. The herb contains convolvulin, a stimulant laxative that can trigger uterine contractions and potentially cause miscarriage. Its purgative effects may also lead to significant fluid and electrolyte losses harmful to both mother and fetus. Breastfeeding women should likewise avoid this herb. Evidence level: C. Pregnant individuals should consult a healthcare provider for safer alternatives.

Common side effects include gastrointestinal cramping, abdominal discomfort, and loose stools due to the herb's stimulant laxative action. Higher doses may cause diarrhea, electrolyte imbalances, and dehydration. Individuals with inflammatory bowel disease (IBD) or intestinal obstruction should avoid this herb entirely, as it may exacerbate these conditions. Evidence level: C. Discontinue use if severe symptoms develop and seek medical attention.