Yin Qiao San

Reducing fever: Experiments show that oral administration of this formula can significantly reduce bigeminal vaccine- and pentageminal vaccine-induced fever in rabbits, with the effect being of no significant difference from that of the group treated with compound aspirin (0.2mg/kg).(3),(4)

Countering pathogenic microorganism: Both the formula as a whole and its individual ingredients have an inhibitory effect externally on several bacteria and viruses.(5),(6),(7)

Anti-inflammatory: The formula has a significant inhibitory effect on experimental inflammation in animals. In terms of inhibiting dimethylbenzene-induced increase in skin capillary permeability, the effect of orally-administered Yin Qiao San is measured as follows: minimum anti-inflammatory dose: 1.5g/kg; half-life period of effect: 4.53 hours; duration of effect: 16.23 hours; and effect peaking time: 2.31 hours.(8)

Analgetic: As indicated in hot plate and acetic torsion experiments on mice, this formula has an analgetic effect.(9)

Antiallergic: Oral feeding rats and mice the teabag form of this formula (10g/kg) has a significant inhibitory effect on their Radix Trichosanthis-induced skin allergic reaction. Further, a variety of forms of this formula (e.g, decoction, tablets, and teabags) are shown to have an inhibitory effect on dinitrochlorobenzene-induced otic skin delayed hypersensitivity in mice.(10)

Enhancing the immune system: Experiments show that this formula can significantly promote the phagocytic function of mice's abdominal macrophage.(11)

Miscellaneous: This formula is shown to have a significant inhibitory effect on intestinal hyperperistalsis in animals.(12)

Influenza
Of 50 flu cases treated with this formula in a study, all cases showed a speedy decrease in body temperature, self-reported significant improvement in symptoms, and resolved in two to four days.(14)

In another study, this formula was given to 1,480 people as a preventive measure against influenza (treated with 1-2 pills daily for 1.5 months) and the results were: the treatment group had a flu contraction rate of 2.6%, while the comparison group had one of 17.55%.(15)

Pneumonia
Various studies have reported the effectiveness of treating lobar pneumonia and pneumonia.(16),(17),(18)

Encephalitis B
A study used a variation of this formula was used to treat 37 cases of mild epidemic encephalitis B and reported satisfactory results in all cases.(19)

Another study treated 81 cases of epidemic encephalitis with this formula and reported the results as follows: 74 cases resolved and 6.1% died of the disease; the temperature returned to normal within 1-2 days in 21 cases, within 3-5 days in 59 cases, and after 7 days in 1 case.(20)

Parotitis
This formula was used to treat 130 cases of parotitis with excellent results, including decreasing complications.(21)

Measles, isthmus herpes, and German measles
A number of studies have confirmed the effectiveness of treating measles, isthmus herpes, and German measles with this formula.(22),(23),(24)

• Formula is suitable for the first sign and early stages of the common cold.
• Formula works best if capsules are separated and contents are dissolved into 1 cup of hot water. Drink as a tea.
• For the early stages of a cold, the tea's benefit can be boosted by the addition of 3 pieces of raw ginger and 3 pieces of the white portion and roots of a scallion.