Medical Knowledge


Urinary stone is a common disease and has high rate of recurrence in the urinary tract. It results from the precipitation of some elements in the urine at the certain chemical physical conditions. The stone blocks the urinary tract, causes infection and pain, these influence the health state of the patients.


Epidemic research shows that urinary kidney stone is one of the popular diseases in the world, accounts for 3% of the population, accounts for 30-50% of urinary patients. The disease occurs with high rate in male of China, Vietnam, Malaysia, Thailand, India, Pakistan, Greek, England and  Scandinavie island.

Vietnam belongs to kidney stone belt of the world. Statistically data exhibits that the rate of kidney stone in male is 69.39%, 30,61% for female, suffering age is from 25-60. Therefore, kidney stone has been taken into account of modern medicine and traditional medicine as well.

Kidney stone may be found in any part of the urinary tract. Stone in the ureter is usually formed in calyx and then fell in to the ureter. Stone in the urinary tract is formed in the bladder and then follow the urine down to the urethra.

Stone in the kidney accounts for 54.26%, stone in the uterer accounts for 40.97% and a small rate of kidney stone in the bladder.

Chemical analysis of kidney stone reveals that constituent of kidney stone categorized into 5 kinds. Calcium originated stone keeps the highest rate (60-80%), possibly caused by the production of Oxalate or Phosphate Calcium due to the increace of calcium content in the urine; Ammonium Magnesium Phosphate stone (or called Struvite stone or coral stone) which caused by urinary infection is 5 – 15%, other types of kidney stone is rarely seen, it caused by metabolism disorder: Cystin stone is caused by genetic disorder, Uric stone is caused by the increase of uric acid in the urine, silicon dioxide stone is caused by prolonged use of Magnesium Trisilicate which is usually administered in the treatment of duodenum – gastric ulcer.

Kidney stone results in many complication. Kidney stone is prevented and treated by some measure of internal medicine and surgery. However, each methods has its own disadvantages.

Treatment by internal medicine according to western medicine has very limited results and is expensive. Surgery treatment by operation to take out the stone or technique of ultrasonic to break the stone, to destroy the stone through skin, to take out the urinary stone through endoscopy, etc. are invasive techniques. These has expensive treatment cost, sometimes occurs surgical catastrophe and is particularly administered, requires special machinery and skilled technicians.

Treatment of kidney stone by traditional medicine has been developed since the late of 1970. Kim Tien Thao - Desmodium styracifolium (Osb.) Merr. (Fabaceae) – is a medicinal herb which is very efficacious in treatment of urinary stone. Trieu Hoc Man (1719-1805) in the book “The Compendium of Materia Medica” has mentioned Desmodium styracifolium at the first time.

Since 1970, Desmodium styracifolium has been used to treat urinary stone in China, rate of stone elimination is 30 -63.3% for stone with dimension less than 8mm. Desmodium styracifolium has been introduced in Chinese Pharmacopoeia in monograph Shilintong (in form of finished product). The Chinese traditional medicine has perceived Desmodium styracifolium as the ideal herb to treat urinary stones.

Modern pharmacological studies show that Desmodium styracifolium has the following effects:

  • Induces diuretic evidently,
  • Eliminates inflammation, relieves pain,
  • Has antibiotic effect,
  • Eliminates and eradicates kidney stone,
  • Benefits the bile and increases the bile excretion.

Therefore, the mechanism for elimination of kidney stone is explained as following: Firstly, Desmodium styracifolium causes diuretic, dilutes the urine and stops the stone from forming bigger. Then, thanks to anti-inflammation and antibiotic properties, it reduces oedema of the urinary tract, facilitates the stone moving downward and being expelled. Eastern medicine’s concept is the same of that and call it shillitong (expel the stone and clear the urinary tract).

In Vietnam, Desmodium styracifolium has been studied on bacterial resistance since 1975, introduced in books Vietnamese Medicinal Herbs  since 1978 and officially shown in Vietnamese Pharmacopoeia III published in 2002. Researches show that chemical components of leaves of Desmodium styracifolium includes flavonoide, Phenolic, Glycoside, NaCl, KCl, etc. Toxical test in mice with dosage equivalent to 333 times of clinical dose exhibits that Desmodium styracifolium almost never has toxicity.

Clinical result evidences that Desmodium styracifolium has good efficacy in stone originated from Calcium. Duration of treatment depends on the dimension and the location of the stone in the urinary tract.

Desmodium styracifolium rarely causes side effects in case of long term use. After there are no clinical symptoms left, kidney stone formation can be prevented by intake of Desmodium styracifolium with lower dose.

Kim tien Thao OPC with the brand name “The Old Man”, a pharmaceutical product treating urinary stones was firstly produced in Vietnam in 1998 through advanced herbal multipurpose extraction technique which invested only in OPC  Pharmaceutical Joint Stock Company.

Kim tien Thao OPC with the brand name “The Old Man” is produced according to the monograph Shilitong finished product in Chinese Pharmacopoeia published in 1990 and 1995. Over 16 years of product life cycle, Kim tien Thao OPC is currently presented in the market with the following major forms:

Kim tien Thao film coated tablets, or sugar coated tablets, box containing 1 bottle of 100 tablets. Take orally 5 tablets/time x 3 times/day. Drink lot of water during treatment duration. Each coated tablet contains 120mg of dry extract equivalent to 2.4g Desmodium styracifolium.

  • New released product Desmodin, launched in the market in July 2014, box of 5 blisters  x 12 film coated tablets. Take orally 2 tablets/time x 3 times/day. Drink lot of water during treatment duration. Each coated tablet contains 300 mg of dry extract equivalent to 6.0g Desmodium styracifolium.

Distinguishing features of Desmodin - Kim Tien Thao with “The Old Man” brand name of OPC is that the company applies the most advanced extraction technique. The multipurpose extraction system is circulative and convective, changes the extraction solvent to yield the pure extract with treatment efficacy. All the stage of production process is carried out in the factory complying with WHO GMP Standard.

Multipurpose extraction system and double effect concentration system.

High performace liquid chromatography and gas chromatography for quality inspection

With the revenue of some billions VN dong in the beginning years launching in the pharmaceutical market for treating urinary stone (1998-1999), Kim Tien Thao OPC with “the old man” brand name sharply reached the revenue of over 22 billion VN dong in the year 2000, became one of 10 the most prominent events of Vietnam Pharmaceutical Cooperation and kept good growth.

In recent years, in spite of confronting by hundreds of competitive products domestically and abroad, Kim Tien Thao OPC with “the old man” brand name always win the trust of customers, its sale increases strongly and always hold the leading market share of kidney stone medicine in Vietnam. Beside that, Kim Tien Thao OPC step by step participates into oversea market since the beginning of the 21st century.

Professor Filser – author of the well-known book “customer behaviour” has written: “customer’s loyalty is not unchanged” because they have too much choice when deciding to buy one kind of product but with many trade names. The fact is that Kim Tien Thao OPC with “the old man” brand name is always for ever accompanying with customer loyalty due to quality of Kim Tien Thao and the prestige of the company.

Mr Nguyen chi Linh – Vice of the Board of the Directors, CEO of the company has said: OPC attaches special importance to invest in science and technology, to improve the competitiveness of the domestic medicine, there are no measure other than increase the content of science and technology in each tablet finished product. Furthermore, the company have to determine which is corporation’s competitive advantage, which products is strategic. OPC itself has experienced this stage and has orientated pharmaceutical product to invest and develop in the long time.

On the quality aspect, OPC is one of the leading corporations producing herbal medicine and complying with WHO-GMP Standard. Source of starting herbal materials are concisely identified, standardised and cultivated according to GACP Standard.

Kim Tien Thao is grown in OPC Bac Giang Factory, according to GACP Standard.

Pharmacological test of Kim Tien Thao OPC with “The Old Man” brand name was carried out in of Traditional Pharmaceutical and Medical Institute of Ho Chi Minh City in 1997, Its clinical test result was  good and was carried out in Nguyen Tri Phuong Hospital (09/1999 - 03/2000), Thong Nhat Hospital (05/1999 - 03/2000) and Clinical Hospital belonging to National Institute for Pharmacy and Medicine of URAL – Russia (11/2000).

Kim Tien Thao OPC with “The Old Man” brand name has granted “the Golden Cup  for the products with prestige and quality” from Vietnam Industry Property Association. Kim Tien Thao OPC with “The Old Man” brand name is honorably granted the title “The Star of Vietnamese Medicine” from Ministry of Health in 2014.


Distinguishing from other kidney stone medicine, quality meaning of Kim Tien Thao OPC with “The Old Man” brand name is that the product is assured at optimum and stablised quality due to modern multipurpose herbal extraction system in the growing, cultivating, processing area and optimal manufacturing procedure; furthermore, Kim Tien Thao OPC with “The Old Man” brand name reaches to a higher level, that is the perceiving value in customer’s heart and mind.

On epidemic aspect, “The Old Man” image of Kim Tien Thao OPC represents the gender, age and most of Asia country locates within the belt of urinary stone.

For the manifestation of cultural characteristic of the ethnic category, “The Old Man” image of Kim Tien Thao OPC is a democratic manner, homely, friendly, represents the “Seniores priores” manner, “respect the elders and yield the youngers” characteristic;  Vietnamese children, grandchildren and descendant always care about the health of their grandparents and parents; “The Old Man” image expresses these above mentioned deeply meaning.

On the concept of differentiation creation so as to position trade name successfully, Kim Tien Thao OPC with “The Old Man” brand name has become a perceiving assembly of quality, image, lifestyle, safe and convenience in the thinking of current and future customers.

Exactly as  Al Reis & Laura Reis have written: Marketing is not a battle of products, it is a battle for the way of thinking” and “to act firstly is the best”.

The figure of 16 past years shows that Kim Tien Thao OPC with “The Old Man” brand name has received ten thousands of thanking via email, fax, telephone, letter, etc. from everywhere domestically and abroad.

With that perfect value, we hope that Desmodin Kim Tien Thao OPC with “The Old Man” brand name will continue to receive the support of the customers and will ever be the first choice  of patients in treating urinary stone.


By Master Pharmacist Lan Nguyen Thi Ngoc Translate by Master Pharmacist Dan Tran Ngoc

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