The following side effects are presented in accordance with the following gradations of their frequency: very frequent (≥ 1/10), frequent (≥ 1/100, <1/10); infrequent (≥ 1/1000, <1/100); rare (≥ 1/10000,<1/1000); very rare (<1/10000) (including individual messages), unknown frequency (it is not possible to determine the frequency of occurrence according to available data).
Data from clinical studies of levofloxacin
Heart Disease
Rare: sinus tachycardia
Unknown frequency: elongation interval QT.
Violations of the blood and lymphatic system
Infrequent: leukopenia (decrease in the number of leukocytes in peripheral blood), eosinophilia (an increase in the number of eosinophils in peripheral blood).
Rare: neutropenia (decrease of neutrophils in peripheral blood), thrombocytopenia (decrease the number of platelets in the peripheral blood).
Unknown frequency: pancytopenia (decrease in the number of all form elements in peripheral blood), agranulocytosis (absence or sharp decrease in the number of granulocytes in peripheral blood), hemolytic anemia.
Disturbances from the nervous system
Frequent: headache, dizziness.
Infrequent: drowsiness, tremor, dysgeusia (perversion of taste).
Rare: paresthesia, convulsions.
Unknown frequency: peripheral sensory neuropathy, peripheral sensory-motor neuropathy, dyskinesia, extrapyramidal disorders, loss of taste, parosmia (disorder of a sense of smell, especially subjective sense of smell, objectively absent), including loss of smell.
Disturbance of the organs of vision
Very rare: visual impairment, such as the vagueness of the visible image.
Hearing disorders and labyrinthine disorders
Infrequent: vertigo (feeling deflection or twisting or own body or surrounding objects).
Rare: ringing in the ears.
Unknown frequency: decrease hearing.
Disturbances from the respiratory system, chest and mediastinal organs
Infrequent: shortness of breath.
Unknown frequency: bronchospasm, allergic pneumonitis.
Disorders from the gastrointestinal tract
Frequent: diarrhea, vomiting, nausea.
Infrequent: abdominal pain, indigestion.
Unknown frequency: hemorrhagic diarrhea, which in very rare cases may be a sign of enterocolitis, including pseudomembranous colitis.
Disorders from the kidneys and urinary tract
Infrequent: increased serum creatinine concentration.
Rare: acute renal insufficiency (for example, due to development interstitial nephritis).
Disturbances from the skin and subcutaneous tissues
Infrequent: rash, itching, hives.
Unknown frequency: toxic epidermal necrolysis, Stevens-Johnson syndrome, exudative erythema multiforme, photosensitivity reactions (hypersensitivity to solar and ultraviolet radiation), leukocytoclastic vasculitis. Reactions from the skin and mucous membranes can sometimes develop even after taking
Disturbances from the musculoskeletal system and connective tissue
Infrequent: arthralgia, myalgia.
Rare: lesions of tendons, including tendonitis (for example, Achilles tendon), muscle weakness, which can be especially dangerous in patients with pseudo-paralytic myasthenia gravis (myasthenia gravis).
Unknown frequency: rhabdomyolysis, tendon rupture (eg Achilles tendon). This side effect can be observed within 48 hours after the start of treatment and can be bilateral.
Disorders from the metabolism and nutrition
Infrequent: anorexia.
Rare: hypoglycemia, especially in patients with diabetes mellitus (possible signs of hypoglycemia: "wolfish" appetite, nervousness, perspiration, trembling).
Infectious and parasitic diseases
Infrequent: fungal infections, development of resistance of pathogenic microorganisms.
Vascular disorders
Rare: decreased blood pressure pressure.
General disorders
Infrequent: asthenia.
Rare: pyrexia (increased body temperature).
Immune system disorders
Rare: angioedema.
Unknown frequency: anaphylactic shock, anaphylactoid shock. Anaphylactic and Anaphylactoid reactions can sometimes develop even after taking the first dose of the drug.
Disturbances from the liver and bile ducts
Frequent: increased activity "hepatic" enzymes in the blood (for example, alanine aminotransferase (ALT), aspartate aminotransferase (ASAT)).
Infrequent: increased concentration of bilirubin in the blood.
Unknown frequency: severe liver failure, including cases of development of acute hepatic insufficiency, especially in patients with severe underlying disease (eg, sepsis); hepatitis.
Disorders of the psyche
Frequent: insomnia.
Infrequent: a sense of anxiety, confusion of consciousness.
Rare: mental disorders (for example, with hallucinations), depression, agitation (agitation), sleep disturbance, nightmares.
Unknown frequency: mental disorders with behavioral disorders with self-harm, including suicidal thoughts and suicidal attempts.
Other possible undesirable effects related to all fluoroquinolones
Very rare: attacks of porphyria (a very rare metabolic disease) in patients already suffering from this disease.