Chondroitin sulfate

Chemical formula: C14H21NO15S 

Interactions

Chondroitin sulfate interacts in the following cases:

Platelet antiaggregants

No effect at platelet level has been observed within the recommended dose rates. However, with rats and doses greatly in excess of the recommended 50 mg/kg/day (which would correspond to 4,000 mg in humans/day), a slight platelet antiaggregant activity has been observed. This reaction will have to be taken into account when chondroitin sulfate is used in conjunction with platelet antiaggregants (acetylsalicylic acid, dipyridamole, clopidrogel, ditazol, trifusal or ticlopidine).

Renal failure

There is little experience available on the use of chondroitin sulfate by patients suffering from kidney failure. Therefore, these patients must be treated with special attention.

In very rare occasions (<1/10.000) such patients have experienced cases of edema and/or water retention. This can be attributed to the osmotic effect of chondroitin sulfate.

Heart failure

In very rare occasions (<1/10.000) such patients have experienced cases of edema and/or water retention. This can be attributed to the osmotic effect of chondroitin sulfate.

Pregnancy

There is no research on the use of chondroitin sulfate by pregnant women. Therefore, its use should be avoided during this period.

Nursing mothers

There is no research on the use of chondroitin sulfate by lactating women. Therefore, its use should be avoided during this period.

Effects on ability to drive and use machines

There is no evidence that chondroitin sulfate interferes with the ability to drive vehicles or operate machinery.

Adverse reactions


In the following table adverse reactions observed in clinical trials* (on a total of 1826 patients, out of which 1264 were treated with chondroitin sulfate) and during post marketing surveillance are listed. Adverse reactions are grouped by System Organ Class.

Within each System Organ Class, the adverse reactions are classified according to frequency of observation, using the following convention: very common (>1/10); common (>1/100, <1/10), uncommon (>1/1,.000, <1/100); rare (>1/10,000, <1/1,000); very rare (<1/10,000).

Gastro-intestinal disorders RareGastrointestinal disorder*
Epigastralgia*
Nausea*
Diarrhoea*
Skin and subcutaneous tissue disorders RareErythema
Rash*
Rash maculo-papular
Very rareUrticaria
Eczema
Pruritus
Allergic reaction**
General disorders and administration site conditions Very rareOedema

* adverse reactions observed in clinical trials
** Cases of allergic reactions (such as angioneurotic edema) have rarely been reported

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