Celecoxib, considering the antipyretic effect, may reduce the diagnostic significance of such a symptom as fever, and affect the diagnosis of infection.
Influence on the cardiovascular system
Celecoxib, like all coxibs, can increase the risk of serious complications from the cardiovascular system, such as thrombosis, myocardial infarction and stroke, which can lead to death. The risk of these reactions may increase with the dose, the duration of the drug,as well as in patients with diseases of the cardiovascular system and risk factors for such diseases. To reduce the risk of these reactions in patients taking celecoxib, it should be used in the least effective doses and as short as possible (at the discretion of the treating physician). The attending physician and the patient should keep in mind the possibility of such complications, even in the absence of previously known symptoms of cardiovascular dysfunction. Patients should be informed of the signs and symptoms of adverse effects on the cardiovascular system and the measures to be taken if they occur.
With the use of NSAIDs (selective inhibitors of COX-2) in patients after an operation of aortocoronary shunting for the treatment of pain in the first 10-14 days, an increase in the frequency of myocardial infarction and cerebral circulation disorders is possible.
Due to the weak effect of celecoxib on the function of platelets, it can not be a substitute for acetylsalicylic acid for the prevention of thromboembolism. Also, in connection with this, antiplatelet therapy should not be canceled (for example,acetylsalicylic acid) in patients at risk of developing thromboembolic complications.
Like all NSAIDs, celecoxib can lead to an increase in blood pressure, which can also cause complications from the cardiovascular system. All NSAIDs, including celecoxib, in patients with hypertension should be used with caution. Monitoring of blood pressure should be performed at the beginning of therapy with celecoxib, and during the course of treatment.
Effect on the gastrointestinal tract
In patients who took celecoxib, extremely rare cases of perforation, ulceration and bleeding from the gastrointestinal tractof tract.
The risk of developing these complications in the treatment of NSAIDs is highest in the elderly, patients with cardiovascular diseases, patients receiving acetylsalicylic acid concurrently, and patients with gastrointestinal tract diseases such as ulcers, bleeding, inflammatory processes in the acute stage and in the anamnesis. Other risk factors for bleeding from the gastrointestinal tract are simultaneous use with oral glucocorticosteroids and anticoagulants, a long period of therapy with NSAIDs, smoking, and alcohol use.Most spontaneous reports of serious side effects on the gastrointestinal tract were related to elderly and debilitated patients.
Co-administration with warfarin and other anticoagulants
Serious (some of them fatal) bleeding was reported in patients who received concomitant treatment with warfarin or similar agents. As the prothrombin time has been reported, anticoagulant activity should be monitored after initiation of drug treatment or a change in its dose.
Fluid retention and swelling
As with the use of other drugs that inhibit the synthesis of prostaglandins, in a number of patients taking celecoxib, fluid retention and swelling may occur, so caution should be exercised when using this medication in patients with conditions predisposing or worsening due to fluid retention. Patients with a history of heart failure or hypertension should be closely monitored.
Effect on kidney function
Long-term use of NSAIDs may lead to papillary necrosis of the kidneys or other impairment of kidney function.It was found that celecoxib is not more toxic than other NSAIDs. Nephrotoxicity is also noted in patients, Pg which play a compensatory role in maintaining renal blood flow. The use of NSAIDs in this group of patients can lead to a dose-related decrease in education Pg and, secondarily, a decrease in renal blood flow, which leads to impaired renal function. The risk of nephrotoxicity is high in patients with initial impairment of kidney function, heart failure, impaired liver function, simultaneously accepting diuretics, ACE inhibitors, ARA II, and elderly patients. Nephrotoxic the effect, as a rule, is reversible with the abolition of therapy with NSAIDs.
Patients with impaired renal function should be administered with caution. Kidney function should be carefully monitored. Also, care should be taken in patients with dehydration. In such cases, it is advisable to rehydrate, and then begin therapy with the drug Celecoxib.
Effects on liver function
Celecoxib should not be used in patients with impaired hepatic function (class C according to the Child-Pugh classification). Celecoxib should be used with caution in the treatment of patients with moderate hepatic impairment and prescribe at the lowest recommended dose.
In some cases severe liver reactions have been observed, including fulminant hepatitis (sometimes fatal), liver necrosis, liver failure (sometimes with a fatal outcome or the need for liver transplantation). Most of these reactions developed 1 month after the initiation of celecoxib.
In patients with symptoms and / or laboratory signs of liver dysfunction, more severe liver reactions should be monitored during treatment with the drug. After 2 weeks of using the drug, it is necessary to monitor the indicators of liver function. If signs of liver damage (skin itching, yellowing of the skin, nausea, vomiting, abdominal pain, darkening of the urine, increased activity of the liver transaminases) or systemic manifestations (eg, eosinophilia, skin rash, etc.), it is necessary to cancel the drug and apply to the attending physician.
Anaphylactic reactions
When receiving celecoxib, rare cases of anaphylactic reactions and angioedema have been reported.
A drug Celecoxib, which has antipyretic effect, can reduce the diagnostic value of fever, which makes it difficult to diagnose the infection.
Serious reactions from the skin
Very rarely, when taking celecoxib, there were serious reactions from the skin, such as exfoliative dermatitis, syndrome FROMversusensa-Johnson, toxic epidermal necrolysis, some of them fatal. The risk of occurrence of such reactions is higher in patients at the beginning of therapy, in most noted cases such reactions began in the first month of therapy. You should stop taking the drug when skin rash, changes in the mucous membranes, or other signs of hypersensitivity.
Therapy with glucocorticosteroids (GSK)
Do not replace the therapy with GCS drug in the treatment of glucocorticosteroid insufficiency. With a sudden discontinuation of the SCS, the syndrome of "withdrawal" develops.
Influence on the organs of hematopoiesis
Patients on the background of taking the drug sometimes have anemia. In the presence of symptoms of anemia or hemorrhage, the parameters of hemoglobin and hematocrit should be monitored.The drug in these dosages, as a rule, does not affect the number of platelets, the prothrombin time and activated partial thromboplastin time, and also does not affect platelet aggregation.
Bronchial asthma in history
The use of the drug in patients with bronchial asthma, provoked by the intake of NSAIDs, can cause severe bronchospasm, which can be fatal. There is a cross reactivity in the form of bronchospasm between acetylsalicylic acid and other NSAIDs. Such patients should not use the drug Celecoxib.
Elderly patients
There are no significant differences in the effectiveness of the drug in elderly patients compared with young volunteers. According to the post-marketing application in elderly patients, spontaneous reports of undesirable effects on the part of the digestive organs with a lethal outcome and the development of acute renal failure were observed more often than in young patients.
Slow metabolism of isoenzymatic substrates CYP2C9
Patients with a known slow metabolism of isoenzyme substrates CYP2C9 (on the basis of a genotype or in the anamnesis) or with suspicion on such condition it is necessary to apply a preparation with care. It is recommended to begin therapy with the initial recommended dose, reduced by 2 times.
The use of the drug may adversely affect female fertility and not is recommended for women planning a pregnancy. Patients with infertility (at Tom number of undergoing examinations) it is recommended to cancel the drug.
Special information on excipients
The drug contains lactose, so the drug is contraindicated in patients with lactose intolerance, lactase deficiency or glucose-galactose malabsorption syndrome.