What Are the Side Effects and Contraindications of Lysimachia christinae (Jin Yin Cao)?

Coinleaf Desmodium (Desmodium styracifolium), a traditional Chinese medicinal herb, contains phenolic compounds, flavonoids, glycosides, tannins, volatile oils, amino acids, choline, sterols, potassium chloride, lactones, and other bioactive constituents. It is commonly used in Traditional Chinese Medicine (TCM) for clearing heat and detoxifying the body. So, what are the adverse effects and contraindications associated with Coinleaf Desmodium? The following section addresses this question.

Adverse Effects of Coinleaf Desmodium

As Coinleaf Desmodium is classified as a “cold”-natured herb in TCM, prolonged use may impair the Spleen and Stomach functions. Individuals with pre-existing Spleen- and Stomach-deficiency should therefore exercise caution when using it. Moreover, long-term or excessive use may diminish its efficacy in dissolving calculi—or even exacerbate existing conditions. Additionally, it is unsuitable for certain individuals—particularly those with Cold-type Spleen and Stomach patterns or chronic diarrhea—as ingestion may aggravate these symptoms. Thus, dosage should always be moderate. Clinical reports also indicate that Coinleaf Desmodium may induce contact dermatitis and allergic reactions.

Contraindications of Coinleaf Desmodium

Fresh juice extracted from Coinleaf Desmodium is strictly contraindicated in patients suffering from Yin-type abscesses or toxic swellings, as well as those with Spleen deficiency complicated by diarrhea. Although Coinleaf Desmodium offers certain health benefits, self-administration without professional guidance is strongly discouraged. Patients with underlying conditions—including cardiovascular disease, diabetes, hypertension, or hyperlipidemia—must consult qualified healthcare practitioners before use. Due to its cold nature, individuals with a constitutionally deficient-cold pattern should use it cautiously. When purchasing, select specimens with intact leaves and a fresh, aromatic scent.

Additional Information: Therapeutic Effects and Actions of Coinleaf Desmodium

1. Clears Heat and Promotes Urination

Coinleaf Desmodium has a bitter taste and cold nature, entering the Bladder and Kidney meridians. It effectively clears damp-heat from the Bladder and promotes diuresis. In clinical presentations such as urinary retention with scanty, painful, yellowish-red urine; urgent, distending lower abdominal pain; dry, bitter mouth; thick, greasy tongue coating; red tongue body; and rapid, forceful pulse—indicative of damp-heat obstructing the Bladder and impairing qi transformation—Coinleaf Desmodium may be employed to clear heat and promote urination, thereby facilitating the downward elimination of pathogenic heat.

2. Immunomodulatory Effects

Both aqueous decoctions of Coinleaf Desmodium administered alone and in combination with cyclophosphamide significantly prolong skin graft survival time in mice, suggesting anti-type IV hypersensitivity activity. Furthermore, oral administration of its aqueous extract to mice reduces thymocyte counts while promoting thymocyte egress from the thymus, and markedly suppresses the blastogenic responses of splenic lymphocytes induced by phytohemagglutinin (PHA) and lipopolysaccharide (LPS).

3. Antibacterial and Anti-inflammatory Effects

The total flavonoid-phenolic acid fraction of Coinleaf Desmodium demonstrates significant inhibitory effects on both acute and chronic inflammatory models—including increased vascular permeability in mice and egg-white-induced paw edema in rats. Its anti-inflammatory potency is slightly superior to that of Guangdong Coinleaf Desmodium (Desmodium chinense). Moreover, its aqueous decoction exhibits broad-spectrum antibacterial and anti-inflammatory activity against multiple pathogenic bacteria.

The above outlines the potential adverse effects and contraindications associated with Coinleaf Desmodium. We hope this information proves helpful to you.