Undesirable reactions were noted in 5-14% of patients taking ciprofloxacin. The most common side effects are nausea, vomiting and skin rashes.
The incidence of side effects is classified according to the recommendations of the World Health Organization: very often - not less than 10%; often - not less than 1%, but less than 10%; infrequently - not less than 0,1%, but less than 1%; rarely - not less than 0.01%, but less than 0.1%; very rarely - less than 0.01%, including isolated cases.
Infections and infestations: infrequently - fungal superinfection, candidiasis (including oral, vaginal candidiasis, candidiasis of the gastrointestinal tract (GIT)).
From the digestive system: often - nausea, diarrhea vomiting, indigestion, loss of appetite, flatulence, abdominal pain; rarely - dysphagia, pancreatitis, hepatitis, jaundice, including cholestatic, necrosis of the liver, in single cases leading to life-threatening liver failure; very rarely - antibiotic-associated pseudomembranous colitis, in isolated cases taking life-threatening forms.
From the nervous system: often - dizziness, headache, agitation,tremor; infrequently - insomnia, perversion of taste (reversible, disappears after ciprofloxacin withdrawal); rarely - hallucinations, paresthesia (peripheral paralgesia), "nightmarish" dreams, depression, convulsions, hypesthesia, drowsiness, exacerbation of myasthenia symptoms, confusion, disorientation, peripheral neuropathy, polyneuropathy; very rarely convulsive seizures such as grand mal, gait disturbance, psychosis (in which patients can cause harm), increased intracranial pressure, ataxia, hyperesthesia, muscle hypertension, impaired sense of smell, loss of smell (usually disappears after ciprofloxacin withdrawal), migraine , anxiety, loss of taste.
From the side of the organ of vision: very rarely - visual disturbances, double vision, violation of color perception.
From the side of the organ of hearing and balance: very rarely - noise in the ears, temporary deafness (especially with frequent admission of ciprofloxacin).
From the musculoskeletal system: infrequently - pain in the joints; rarely - muscle pain, swelling of the joint, pain in the limbs, back pain, increased muscle tone, muscle weakness,exacerbation of myasthenia gravis symptoms; very rarely - convulsive muscle contraction, tendon inflammation (mainly Achilles tendon, including tenosynovitis), partial or complete rupture of the tendon (mainly Achilles tendon).
From the cardiovascular system: infrequent - a feeling of heartbeat; rarely - tachycardia, vasodilation, fainting, "tides" of blood to the face, lowering blood pressure (BP); very rarely - tachycardia, vasculitis (petechial, hemorrhagic bullae, papules, scablike formations), arrhythmia, pirouette type arrhythmia, prolongation of the QTc interval, (mainly in patients with other risk factors for QTc interval prolongation).
From the respiratory system: infrequently - pulmonary embolism, pulmonary edema, hemoptysis, hiccough, shortness of breath, nosebleed; rarely - shortness of breath.
On the part of the blood system and hemopoiesis: often - eosinophilia; infrequently - leukopenia, neutropenia, anemia, granulocytopenia, thrombocytopenia; rarely - leukocytosis, thrombocytosis; very rarely - hemolytic anemia, agranulocytosis, pancytopenia (life-threatening), oppression of bone marrow function (life-threatening).
From the urinary system: rarely acute renal failure, hematuria, crystalluria, interstitial nephritis.
Allergic reactions: often - skin rash; infrequently - itchy skin, patchy-nodular rash, hives; rarely photosensitivity, erythema multiforme, erythema nodosum, facial edema; very rarely - anaphylactoid reactions, laryngeal edema, Stephen-Johnson syndrome, Lyell syndrome, petechiae, anaphylactic shock, serum sickness, angioedema.
Laboratory data: infrequently - increased activity of alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, hyperbilirubinemia, increased urea concentration in the blood; rarely - changes in prothrombin, hyperglycemia; very rarely - increased activity of amylase, lipase.
Other: infrequently - general weakness, sweating, drug fever; rarely - pain in the chest, peripheral edema.