Joint disease drastically reduces an animal’s mobility. It can be caused by excessive wear of the joints (for example, due to increased physical exertion), inflammation, injuries, ageing or hereditary predispositions.

The main cause of joint problems is a decrease in the level of hyaluronic acid in the cartilage and joint fluid. This substance binds water, thereby ensuring the proper viscoelasticity of synovial fluid (a gel-like fluid that lubricates the joint). The lubrication of the cartilage is directly proportional to the concentration of hyaluronic acid.

If the cartilage is not sufficiently lubricated and there is no effective shock absorption, the cartilage could be irreversibly damaged (with the onset of arthrosis). If larger-scale damage occurs, the cartilage cannot be returned to its original state and joint mobility is impossible to restore.

Functions of hyaluronic acid in the joint

  • Ensures the elasticity of joint fluid.
  • Reduces the activity of inflammatory cells.
  • Reduces the level of inflammatory mediators.
  • Inactivates free oxygen radicals.
  • Prevents the degeneration of cartilage.
  • Stimulates chondrocytes to produce further hyaluronic acid.
  • Reduces pain (it has a direct effect on free nerve endings).

Once joint problems have been detected, treatment to supplement the organism’s hyaluronic acid should be initiated immediately. The Czech product Bonharen has successfully played a role here for more than 15 years.

A return to activity: Bonharen®

Bonharen treats joint diseases effectively, with excellent results in the protection of cartilage. This is pure hyaluronic acid (sodium hyaluronate) intended for the treatment of animals’ musculoskeletal diseases. Applying Bonharen reduces inflammation of the synovial membrane and normalises the properties of joint fluid.

Bonharen’s therapeutic effect has been probed in a multicentre clinical trial involving 14 veterinary facilities. Bonharen’s beneficial effects have been observed in response to a wide range of diseases (osteoarthritis, osteoarthrosis, traumatic joint injury, tendovaginitis, tendon injury, spinal defects). Hyaluronic acid also has an analgesic effect, i.e. it acts as a painkiller.



A medicinal product. Available from your vet!

Packaging: injection drug, 6 x 6 ml or 3 x 6 ml

Active ingredient content: 10 mg in 1 ml of injectable solution

Dosage: 6 ml

Number of doses: 6

Interval between doses: 7 days


Less intense joint problems can be treated with Geloren, a form of joint nutrition available over the counter. Read how Geloren helps to treat joint problems.

Treatment of joints using Bonharen

The fact that hyaluronic acid is a SYSADOA (= symptomatic slow-acting drugs of osteoarthritis) means that the required effect is not instantaneous. Instead, the onset is gradual. However, the resultant effect persists even after treatment comes to an end. After the recommended six doses have been administered, the long-term chondroprotective effect is significantly better than after the application of only five doses.

Bonharen treats diseases of the joints and musculoskeletal system in animals (horses, dogs and cats) effectively, by delivering excellent results in the protection of cartilage and arresting the development of degenerative diseases of the cartilaginous tissue. It is hyaluronic acid (sodium hyaluronate) of maximum purity and quality that has been derived by means of biotechnology.

Bonharen has been found to be effective in 94% of cases. Improvements have been observed with delayed onset over the course of a month, although the symptomatic effects persist for an extended period.

Using Bonharen results in

  • improved joint mobility
  • reduced limping
  • reduced bone spurs
  • reduced swelling and soreness
  • positive effects among subjects suffering from osteoarthritis in various stages