Ageratum Conyzoides

Ageratum conyzoides promotes wound healing primarily through antimicrobial and anti-inflammatory mechanisms. Its essential oils and flavonoids inhibit bacterial growth, preventing wound infection, while chromenes reduce local inflammation and pain. Research suggests these active compounds accelerate tissue contraction and collagen deposition, facilitating faster closure of wounds. However, the presence of pyrrolizidine alkaloids limits its safety profile, making topical application the preferred method over internal use for treating injuries (Evidence Level: C/Traditional).

Yes, Ageratum conyzoides poses significant interaction risks with liver medications due to its hepatotoxic pyrrolizidine alkaloids. Combining this herb with drugs that stress the liver, such as acetaminophen, statins, or antiretrovirals, increases the risk of liver damage or veno-occlusive disease. It may also alter the metabolism of drugs processed by cytochrome P450 enzymes. Patients taking hepatotoxic medications or those with compromised liver function should strictly avoid internal consumption of this herb (Evidence Level: D).

The traditional adult dosage for Ageratum conyzoides is 3 to 6 grams of dried leaf prepared as a decoction, taken internally. For external wound care or rheumatic pain, a paste made from fresh leaves is applied topically to the affected area. Due to the presence of toxic pyrrolizidine alkaloids, internal use should be restricted to short durations only. Long-term ingestion is strongly discouraged to prevent cumulative liver damage (Evidence Level: Traditional).

No, Ageratum conyzoides is considered unsafe during pregnancy and breastfeeding. The plant contains pyrrolizidine alkaloids, which are known hepatotoxins and potential teratogens that can cross the placental barrier. Ingestion during pregnancy may cause fetal liver damage or developmental abnormalities. Additionally, the herb may stimulate uterine contractions, increasing the risk of miscarriage. Pregnant women should avoid all forms of this herb, including topical applications on large skin areas (Evidence Level: C).

The most serious side effect of Ageratum conyzoides is hepatotoxicity, specifically hepatic veno-occlusive disease, caused by its pyrrolizidine alkaloid content. Prolonged internal use can lead to abdominal swelling, jaundice, and liver cirrhosis. Topical application may cause contact dermatitis or skin irritation in sensitive individuals. Because the toxic alkaloids are excreted in breast milk, nursing mothers risk poisoning their infants. Users should immediately discontinue use if signs of liver distress appear (Evidence Level: C).