In some cases, after the first use of the drug may develop hypersensitivity and allergic reactions, which should immediately inform the doctor.Very rarely even after the first use of the drug, anaphylactic reactions can progress to a life-threatening anaphylactic shock. In these cases, treatment with moxifloxacin should be discontinued and necessary medical measures (including anti-shock) should be carried out.
When moxifloxacin is used, prolongation of the QT interval may be noted in some patients.
A drug moxifloxacin should be used with caution in women and elderly patients. Since women have a longer QT interval than men, they may be more sensitive to drugs that extend the QT interval. Elderly patients are also more prone to drugs that affect the QT interval.
The degree of elongation of the QT interval may increase with increasing drug concentration, therefore, do not exceed the recommended dose. However, in patients with pneumonia, there was no correlation between the concentration of moxifloxacin in the blood plasma and the prolongation of the QT interval. The prolongation of the QT interval is associated with an increased risk of ventricular arrhythmias, including polymorphic ventricular tachycardia. None of the 9,000 patients who received moxifloxacin, there were no cardiovascular complications and lethal cases associated with prolongation of the QT interval. However, in patients with predisposing arrhythmias, the risk of developing ventricular arrhythmias may increase with moxifloxacin.
Concerning moxifloxacin contraindicated in patients with established QT interval elongation, patients with uncorrected hypokalemia, patients taking drugs, prolonging the QT interval (see section "Interaction with other drugs").
Because of the risk of additive action on the QT interval moxifloxacin is contraindicated in patients with conditions predisposing to arrhythmias, such as clinically significant bradycardia, clinically significant heart failure, rhythm disturbances, accompanied by clinical symptoms, acute myocardial ischemia; patients with cirrhosis of the liver (since this category of patients can not exclude the risk of developing an extension of the QT interval).
When moxifloxacin was taken, cases of fulminant hepatitis, potentially leading to liver failure (including fatal cases), were reported (see p.section "Side effect"). The patient should be informed that if symptoms of hepatic insufficiency occur, the doctor should be consulted before continuing with moxifloxacin.
When moxifloxacin was taken, cases of development of bullous skin lesions (Stevens-Johnson syndrome, toxic epidermal necrolysis) were reported. The patient should be informed that in case of symptoms of skin or mucous membrane damage, the doctor should be consulted before continuing with moxifloxacin.
The use of drugs quinolone series is associated with a possible risk of seizures. Moxifloxacin Caution should be used with caution in patients with CNS diseases and with conditions suspicious of CNS involvement predisposing to seizures or reducing the threshold of seizure activity. The use of broad-spectrum antibacterial drugs, including moxifloxacin, is associated with a risk of developing pseudomembranous colitis associated with taking antibiotics. This diagnosis should be borne in mind in patients with moxifloxacin onset of severe diarrhea.In this case, the drug should be withdrawn and immediate therapy should be prescribed. Preparations that inhibit the intestinal peristalsis are contraindicated in the development of severe diarrhea. Moxifloxacin should be used with caution in patients with myasthenia gravis in connection with possible exacerbation of the disease.
Against the background of quinolone therapy, including moxifloxacin, especially in the elderly and patients receiving glucocorticosteroids, tendonitis and tendon rupture may develop. Cases which have arisen within several months after the end of treatment are described. At the first symptoms of pain or inflammation at the site of damage, stop taking the medication and unload the affected limb.
When applying quinolones, photosensitivity reactions are noted. However, in the conduct of preclinical, clinical studies, as well as with the use of moxifloxacin, no photosensitivity reactions were observed in practice. Nevertheless, patients receiving moxifloxacin, should avoid direct sunlight and ultraviolet light.
It is not recommended to use the drug in patients with complicated inflammatory diseases of the pelvic organs(for example, associated with tubo-ovarian or pelvic abscesses).
It is not recommended to use moxifloxacin for the treatment of infections caused by Staphylococcus aureus strains resistant to methicillin (MRSA). In the case of suspected or confirmed infections caused by MRSA, treatment should be prescribed with appropriate antibacterial drugs (see the section "Pharmacodynamics").
Ability of the drug Moxifloxacin suppress the growth of mycobacteria can cause in vitro interaction of moxifloxacin with a test for Mycobacterium spp., leading to false-negative results in the analysis of samples of patients treated with moxifloxacin during this period.
In patients treated with quinolones, including moxifloxacin, cases of sensory or sensorimotor polyneuropathy, leading to paresthesia, hypoesthesia, dysesthesia or weakness are described. Patients undergoing treatment with moxifloxacin should be warned of the need to seek immediate medical attention before continuing treatment in the event of symptoms of neuropathy, including pain, burning, tingling, numbness, or weakness (see "Side effect" section).
Reactions from the psyche may occur even after the first appointment of fluoroquinolones, including moxifloxacin. In very rare cases, depression or psychotic reactions progress to the occurrence of suicidal thoughts and behavior with a tendency to self-harm, including suicidal attempts (see "Side effect" section). If the patient develops such reactions, it is necessary to cancel the drug and take the necessary measures. Caution should be exercised when administering moxifloxacin to patients with psychoses and patients with a history of mental illness.
Because of widespread and increasing incidence of infections caused by fluoroquinolone-resistant Neisseria gonorrhoeae, in the treatment of patients with inflammatory diseases of the pelvic organs should not be spending moxifloxacin monotherapy. Except in cases where the presence of N. gonorrhoeae resistant to fluoroquinolones is excluded. If you can not exclude the presence of fluoroquinolone-resistant N. gonorrhoeae, it is necessary to solve the question of supplementing the empirical treatment with an appropriate antibiotic moxifloxacin, which is active against N. gonorrhoeae (eg a cephalosporin).