(1) Effect on urinary system: Plantago asiatica has a certain diuretic effect, which can increase the water excretion of dogs, rabbits and humans, and increase the excretion of urea, uric acid and sodium chloride.

(2) antitussive, antiasthmatic and expectorant effects: both high and low doses of Plantago asiatica decoction can significantly increase the threshold of electrical stimulation for cough in cats, and the plot will be strengthened with the increase of dose.

(3) Antimicrobial effect: The aqueous extract of Plantago asiatica has inhibitory effects on Trichophyton concentric, Trichophyton woolens and Nocardia stellata in vitro.

(4) Effect on gastrointestinal tract: 0.5g/kg of Plantago Plantaginis extract or infusion was given to Pavlov dogs with small stomach and gastropathy, which had a bidirectional regulating effect on gastric secretion; It has antagonistic effect on gastric juice secretion caused by pilocarpine and gastric juice secretion caused by adrenaline. Plantain has inhibitory effect on working stomach, but has no effect on quiet stomach. Plantain can also temporarily increase intestinal juice secretion, but it has no obvious effect on intestinal movement.

(5) Anti-inflammatory effect: Oral administration of 0.5g/kg or 1g/kg psyllium pectin to rats has obvious inhibitory effect on inflammatory edema caused by formaldehyde or dextran.

2. Taboo:

(1) Plantago is a cold herb, so you can't eat plantain in large quantities, otherwise it will cause stomach cold and other symptoms.

(2) Plantago is cold and should not be taken in large quantities, otherwise it may cause symptoms such as diarrhea. Although plantain has certain medicinal value, it can't be used to treat diseases. It depends on a doctor.

(3) For people with weak constitution, plantain should not be used, otherwise it is likely to aggravate the symptoms. Therefore, people with poor health had better not eat plantain.

(4) If the liver organ is poor, it is not appropriate to take plantain, otherwise it is likely to hurt the liver organ, thus causing harm to human health.