Cipro

Last updated on RxList: 4/9/2021
Cipro Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

What Is Cipro?

Cipro (floxacin) is a medication that belongs to the drug class, quinolone antibiotics. Cipro is available as a generic drug and is prescribed to treat infections of the skin, lungs, airways, bones, joints, and urinary tract infections caused by susceptible bacteria.

What Are Side Effects of Cipro?

Common side effects of Cipro include

  • diarrhea,
  • dizziness,
  • headache,
  • stomach upset,
  • abdominal pain,
  • nausea/vomiting, and
  • rash

Dosage for Cipro

Cipro usual oral dose in adults is 250-750 mg (immediate release tablets) every 12 hours or 500-1000 mg (extended release tablets) every 24 hours.

What Drugs, Substances, or Supplements Interact with Cipro?

Drug interactions with Cipro include theophylline (Theo-24), Iron salts (for example, ferrous sulfate), warfarin (Coumadin), sevelamer (Renagel), antacids, milk, and orange juice.

Cipro During Pregnancy and Breastfeeding

Cipro should not be used during pregnancy, as safety has not been determined and also avoided in nursing mothers.

Additional Information

Our Cipro Drug Center provides a comprehensive view of available drug information as well as related drugs, user reviews, supplements and disease and conditions.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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Cipro Consumer Information

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Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).

Ciprofloxacin can cause serious side effects, including tendon problems, damage to your nerves (which may be permanent), serious mood or behavior changes (after just one dose), or low blood sugar (which can lead to coma).

Stop taking this medicine and call your doctor at once if you have:

  • low blood sugar--headache, hunger, irritability, dizziness, nausea, fast heart rate, or feeling shaky;
  • nerve damage symptoms--numbness, tingling, burning pain in your hands, arms, legs, or feet:
  • serious mood or behavior changes--nervousness, confusion, agitation, paranoia, hallucinations, memory problems, trouble concentrating, thoughts of suicide; or
  • signs of tendon rupture--sudden pain, swelling, bruising, tenderness, stiffness, movement problems, or a snapping or popping sound in any of your joints (rest the joint until you receive medical care or instructions).

In rare cases, ciprofloxacin may cause damage to your aorta, the main blood artery of the body. This could lead to dangerous bleeding or death. Get emergency medical help if you have severe and constant pain in your chest, stomach, or back.

Also, stop using ciprofloxacin and call your doctor at once if you have:

  • severe stomach pain, diarrhea that is watery or bloody;
  • fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out);
  • any skin rash, no matter how mild;
  • muscle weakness, breathing problems;
  • little or no urination;
  • jaundice (yellowing of the skin or eyes); or
  • increased pressure inside the skull--severe headaches, ringing in your ears, dizziness, nausea, vision problems, pain behind your eyes.

Common side effects may include:

  • nausea, vomiting, diarrhea, stomach pain;
  • headache; or
  • abnormal liver function tests.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Cipro (Ciprofloxacin)

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Cipro Professional Information

SIDE EFFECTS

The following serious and otherwise important adverse drug reactions are discussed in greater detail in other sections of labeling:

  • Disabling and Potentially Irreversible Serious Adverse Reactions [see WARNINGS AND PRECAUTIONS]
  • Tendinitis and Tendon Rupture [see WARNINGS AND PRECAUTIONS]
  • Peripheral Neuropathy [see WARNINGS AND PRECAUTIONS]
  • Central Nervous System Effects [see WARNINGS AND PRECAUTIONS] Exacerbation of Myasthenia Gravis [see WARNINGS AND PRECAUTIONS]
  • Other Serious and Sometimes Fatal Adverse Reactions [see WARNINGS AND PRECAUTIONS]
  • Hypersensitivity Reactions [see WARNINGS AND PRECAUTIONS]
  • Hepatotoxicity [see WARNINGS AND PRECAUTIONS]
  • Risk of Aortic Aneurysm and Dissection [see WARNINGS AND PRECAUTIONS]
  • Serious Adverse Reactions with Concomitant Theophylline [see WARNINGS AND PRECAUTIONS]
  • Clostridioides difficile-Associated Diarrhea [see WARNINGS AND PRECAUTIONS]
  • Prolongation of the QT Interval [see WARNINGS AND PRECAUTIONS]
  • Musculoskeletal Disorders in Pediatric Patients [see WARNINGS AND PRECAUTIONS]
  • Photosensitivity/Phototoxicity [see WARNINGS AND PRECAUTIONS]
  • Development of Drug Resistant Bacteria [see WARNINGS AND PRECAUTIONS]

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Adult Patients

During clinical investigations with oral and parenteral CIPRO, 49,038 patients received courses of the drug.

The most frequently reported adverse reactions, from clinical trials of all formulations, all dosages, all drug-therapy durations, and for all indications of ciprofloxacin therapy were nausea (2.5%), diarrhea (1.6%), liver function tests abnormal (1.3%), vomiting (1%), and rash (1%).

Table 8: Medically Important Adverse Reactions That Occurred in less than 1% of Ciprofloxacin Patients

System Organ Class Adverse Reactions
Body as a Whole Headache
Abdominal Pain/Discomfort
Pain
Cardiovascular Syncope
Angina Pectoris
Myocardial Infarction
Cardiopulmonary Arrest
Tachycardia
Hypotension
Central Nervous System Restlessness
Dizziness
Insomnia
Nightmares
Hallucinations
Paranoia
Psychosis (toxic)
Manic Reaction
Irritability
Tremor
Ataxia
Seizures (including Status Epilepticus)
Malaise
Anorexia
Phobia
Depersonalization
Depression (potentially culminating in self-injurious behavior
(such as suicidal ideations/thoughts and attempted or completed suicide)
Paresthesia
Abnormal Gait
Migraine
Gastrointestinal Intestinal Perforation
Gastrointestinal Bleeding
Cholestatic Jaundice
Hepatitis
Pancreatitis
Hemic/Lymphatic Petechia
Metabolic/Nutritional Hyperglycemia
Hypoglycemia
Musculoskeletal Arthralgia
Joint Stiffness
Muscle Weakness
Renal/Urogenital Interstitial Nephritis
Renal Failure
Respiratory Dyspnea
Laryngeal Edema
Hemoptysis
Bronchospasm
Skin/Hypersensitivity Anaphylactic Reactions including life-threatening anaphylactic shock
Erythema Multiforme/Stevens-Johnson
Syndrome
Exfoliative Dermatitis
Toxic Epidermal Necrolysis
Pruritus
Urticaria
Photosensitivity/Phototoxicity reaction
Flushing
Fever
Angioedema
Erythema Nodosum
Sweating
Special Senses Blurred Vision
Disturbed Vision (chromatopsia and photopsia)
Decreased Visual Acuity
Diplopia
Tinnitus
Hearing Loss
Bad Taste

In randomized, double-blind controlled clinical trials comparing CIPRO tablets [500 mg two times daily (BID)] to cefuroxime axetil (250 mg–500 mg BID) and to clarithromycin (500 mg BID) in patients with respiratory tract infections, CIPRO demonstrated a CNS adverse reaction profile comparable to the control drugs.

Pediatric Patients

Short (6 weeks) and long term (1 year) musculoskeletal and neurological safety of oral/intravenous ciprofloxacin, was compared to a cephalosporin for treatment of cUTI or pyelonephritis in pediatric patients 1 to 17 years of age (mean age of 6 ± 4 years) in an international multicenter trial. The duration of therapy was 10 to 21 days (mean duration of treatment was 11 days with a range of 1 to 88 days). A total of 335 ciprofloxacin-and 349 comparator-treated patients were enrolled.

An Independent Pediatric Safety Committee (IPSC) reviewed all cases of musculoskeletal adverse reactions including abnormal gait or abnormal joint exam (baseline or treatment-emergent). Within 6 weeks of treatment initiation, the rates of musculoskeletal adverse reactions were 9.3% (31/335) in the ciprofloxacin-treated group versus 6% (21/349) in comparator-treated patients. All musculoskeletal adverse reactions occurring by 6 weeks resolved (clinical resolution of signs and symptoms), usually within 30 days of end of treatment. Radiological evaluations were not routinely used to confirm resolution of the adverse reactions. Ciprofloxacin-treated patients were more likely to report more than one adverse reaction and on more than one occasion compared to control patients. The rate of musculoskeletal adverse reactions was consistently higher in the ciprofloxacin group compared to the control group across all age subgroups. At the end of 1 year, the rate of these adverse reactions reported at any time during that period was 13.7% (46/335) in the ciprofloxacin-treated group versus 9.5% (33/349) in the comparator-treated patients (Table 9).

Table 9: Musculoskeletal Adverse Reactions1 as Assessed by the IPSC

CIPRO Comparator
All Patients (within 6 weeks) 31/335 (9.3%) 21/349 (6%)
95% Confidence Interval2 (-0.8%, +7.2%)
Age Group
12 months < 24 months 1/36 (2.8%) 0/41
2 years < 6 years 5/124 (4%) 3/118 (2.5%)
6 years < 12 years 18/143 (12.6%) 12/153 (7.8%)
12 years to 17 years 7/32 (21.9%) 6/37 (16.2 %)
All Patients (within 1 year) 46/335 (13.7%) 33/349 (9.5%)
95% Confidence Interval1 (-0.6%, + 9.1%)
1. Included: arthralgia, abnormal gait, abnormal joint exam, joint sprains, leg pain, back pain, arthrosis, bone pain, pain, myalgia, arm pain, and decreased range of motion in a joint (knee, elbow, ankle, hip, wrist, and shoulder)
2. The study was designed to demonstrate that the arthropathy rate for the ciprofloxacin group did not exceed that of the control group by more than + 6%. At both the 6 week and 1 year evaluations, the 95% confidence interval indicated that it could not be concluded that the ciprofloxacin group had findings comparable to the control group.

The incidence rates of neurological adverse reactions within 6 weeks of treatment initiation were 3% (9/335) in the CIPRO group versus 2% (7/349) in the comparator group and included dizziness, nervousness, insomnia, and somnolence.

In this trial, the overall incidence rates of adverse reactions within 6 weeks of treatment initiation were 41% (138/335) in the ciprofloxacin group versus 31% (109/349) in the comparator group. The most frequent adverse reactions were gastrointestinal: 15% (50/335) of ciprofloxacin patients compared to 9% (31/349) of comparator patients. Serious adverse reactions were seen in 7.5% (25/335) of ciprofloxacin-treated patients compared to 5.7% (20/349) of control patients. Discontinuation of drug due to an adverse reaction was observed in 3% (10/335) of ciprofloxacin-treated patients versus 1.4% (5/349) of comparator patients. Other adverse reactions that occurred in at least 1% of ciprofloxacin patients were diarrhea 4.8%, vomiting 4.8%, abdominal pain 3.3%, dyspepsia 2.7%, nausea 2.7%, fever 2.1%, asthma 1.8% and rash 1.8%.

Short-term safety data for ciprofloxacin was also collected in a randomized, double-blind clinical trial for the treatment of acute pulmonary exacerbations in cystic fibrosis patients (ages 5–17 years). Sixty-seven patients received CIPRO IV 10 mg/kg/dose every 8 hours for one week followed by CIPRO tablets 20 mg/kg/dose every 12 hours to complete 10–21 days treatment and 62 patients received the combination of ceftazidime intravenous 50 mg/kg/dose every 8 hours and tobramycin intravenous 3 mg/kg/dose every 8 hours for a total of 10–21 days. Periodic musculoskeletal assessments were conducted by treatment-blinded examiners. Patients were followed for an average of 23 days after completing treatment (range 0–93 days). Musculoskeletal adverse reactions were reported in 22% of the patients in the ciprofloxacin group and 21% in the comparison group. Decreased range of motion was reported in 12% of the subjects in the ciprofloxacin group and 16% in the comparison group. Arthralgia was reported in 10% of the patients in the ciprofloxacin group and 11% in the comparison group. Other adverse reactions were similar in nature and frequency between treatment arms. The efficacy of CIPRO for the treatment of acute pulmonary exacerbations in pediatric cystic fibrosis patients has not been established.

In addition to the adverse reactions reported in pediatric patients in clinical trials, it should be expected that adverse reactions reported in adults during clinical trials or postmarketing experience may also occur in pediatric patients.

Postmarketing Experience

The following adverse reactions have been reported from worldwide marketing experience with fluoroquinolones, including CIPRO. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure (Table 10).

Table 10: Postmarketing Reports of Adverse Drug Reactions

System Organ Class Adverse Reactions
Cardiovascular QT prolongation
Torsade de Pointes
Vasculitis and ventricular arrhythmia
Central Nervous System Hypertonia
Myasthenia
Exacerbation of myasthenia gravis
Peripheral neuropathy
Polyneuropathy
Twitching
Eye Disorders Nystagmus
Gastrointestinal Pseudomembranous colitis
Hemic/Lymphatic Pancytopenia (life threatening or fatal outcome)
Methemoglobinemia
Hepatobiliary Hepatic failure (including fatal cases)
Infections and Infestations Candidiasis (oral, gastrointestinal, vaginal)
Investigations Prothrombin time prolongation or decrease
Cholesterol elevation (serum)
Potassium elevation (serum)
Musculoskeletal Myalgia
Myoclonus
Tendinitis
Tendon rupture
Psychiatric Disorders Agitation
Confusion
Delirium
Skin/Hypersensitivity Acute generalize exanthematous pustulosis (AGEP)
Fixed eruption
Serum sickness-like reaction
Special Senses Anosmia
Hyperesthesia
Hypesthesia
Taste loss

Adverse Laboratory Changes

Changes in laboratory parameters while on CIPRO are listed below:

Hepatic –Elevations of ALT (SGPT), AST (SGOT), alkaline phosphatase, LDH, serum bilirubin.

Hematologic–Eosinophilia, leukopenia, decreased blood platelets, elevated blood platelets, pancytopenia.

Renal–Elevations of serum creatinine, BUN, crystalluria, cylindruria, and hematuria have been reported.

Other changes occurring were: elevation of serum gammaglutamyl transferase, elevation of serum amylase, reduction in blood glucose, elevated uric acid, decrease in hemoglobin, anemia, bleeding diathesis, increase in blood monocytes, and leukocytosis.

DRUG INTERACTIONS

Ciprofloxacin is an inhibitor of human cytochrome P450 1A2 (CYP1A2) mediated metabolism. Co-administration of CIPRO with other drugs primarily metabolized by CYP1A2 results in increased plasma concentrations of these drugs and could lead to clinically significant adverse events of the co-administered drug.

Table 11: Drugs That are Affected by and Affecting CIPRO

Drugs That are Affected by CIPRO
Drug(s) Recommendation Comments
Tizanidine Contraindicated Concomitant administration of tizanidine and CIPRO is contraindicated due to the potentiation of hypotensive and sedative effects of tizanidine [see CONTRAINDICATIONS]
Theophylline Avoid Use (Plasma Exposure Likely to be Increased and Prolonged) Concurrent administration of CIPRO with theophylline may result in increased risk of a patient developing central nervous system (CNS) or other adverse reactions. If concomitant use cannot be avoided, monitor serum levels of theophylline and adjust dosage as appropriate [see WARNINGS AND PRECAUTIONS]
Drugs Known to Prolong QT Interval Avoid Use CIPRO may further prolong the QT interval in patients receiving drugs known to prolong the QT interval (for example, class IA or III antiarrhythmics, tricyclic antidepressants, macrolides, antipsychotics) [see WARNINGS AND PRECAUTIONS and Use In Specific Populations].
Oral antidiabetic drugs Use with caution Glucose-lowering effect potentiated Hypoglycemia sometimes severe has been reported when CIPRO and oral antidiabetic agents, mainly sulfonylureas (for example, glyburide, glimepiride), were co-administered, presumably by intensifying the action of the oral antidiabetic agent. Fatalities have been reported. Monitor blood glucose when CIPRO is co-administered with oral antidiabetic drugs [see ADVERSE REACTIONS].
Phenytoin Use with caution Altered serum levels of phenytoin (increased and decreased) To avoid the loss of seizure control associated with decreased phenytoin levels and to prevent phenytoin overdose-related adverse reactions upon CIPRO discontinuation in patients receiving both agents, monitor phenytoin therapy, including phenytoin serum concentration during and shortly after co-administration of CIPRO with phenytoin.
Cyclosporine Use with caution (transient elevations in serum creatinine) Monitor renal function (in particular serum creatinine) when CIPRO is co-administered with cyclosporine.
Anti-coagulant drugs Use with caution (Increase in anticoagulant effect) The risk may vary with the underlying infection, age and general status of the patient so that the contribution of CIPRO to the increase in INR (international normalized ratio) is difficult to assess. Monitor prothrombin time and INR frequently during and shortly after co-administration of CIPRO with an oral anti-coagulant (for example, warfarin).
Methotrexate Use with caution Inhibition of methotrexate renal tubular transport potentially leading to increased methotrexate plasma levels Potential increase in the risk of methotrexate associated toxic reactions. Therefore, carefully monitor patients under methotrexate therapy when concomitant CIPRO therapy is indicated.
Ropinirole Use with caution Monitoring for ropinirole-related adverse reactions and appropriate dose adjustment of ropinirole is recommended during and shortly after co-administration with CIPRO [see WARNINGS AND PRECAUTIONS].
Clozapine Use with caution Careful monitoring of clozapine associated adverse reactions and appropriate adjustment of clozapine dosage during and shortly after co-administration with CIPRO are advised.
NSAIDs Use with caution Non-steroidal anti-inflammatory drugs (but not acetyl salicylic acid) in combination of very high doses of quinolones have been shown to provoke convulsions in pre-clinical studies and in postmarketing.
Sildenafil Use with caution Two-fold increase in exposure Monitor for sildenafil toxicity [see CLINICAL PHARMACOLOGY].
Duloxetine Avoid Use Five-fold increase in duloxetine exposure If unavoidable, monitor for duloxetine toxicity
Caffeine/Xanthine Derivatives Use with caution Reduced clearance resulting in elevated levels and prolongation of serum half-life CIPRO inhibits the formation of paraxanthine after caffeine administration (or pentoxifylline containing products). Monitor for xanthine toxicity and adjust dose as necessary.
Zolpidem Avoid Use Co-administration with ciprofloxacin may increase blood levels of zolpidem, concurrent use is not recommended
Drug(s) Affecting Pharmacokinetics of CIPRO
Antacids, Sucralfate, Multivitamins and Other Products Containing Multivalent Cations (magnesium/aluminum antacids; polymeric phosphate binders (for example, sevelamer, lanthanum carbonate); sucralfate; Videx® (didanosine) chewable/buffered tablets or pediatric powder; other highly buffered drugs; or products containing calcium, iron, or zinc and dairy products) CIPRO should be taken at least two hours before or six hours after Multivalent cation-containing products administration [see DOSAGE AND ADMINISTRATION]. Decrease CIPRO absorption, resulting in lower serum and urine levels
Probenecid Use with caution (interferes with renal tubular secretion of CIPRO and increases CIPRO serum levels) Potentiation of CIPRO toxicity may occur.

Read the entire FDA prescribing information for Cipro (Ciprofloxacin)

© Cipro Patient Information is supplied by Cerner Multum, Inc. and Cipro Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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