Moxifloxacin Drug Information

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. The data described below reflect exposure to moxifloxacin hydrochloride in 14981 patients in 71 active controlled Phase II to IV clinical trials in different indications . The population studied had a mean age of 50 years (approximately 73% of the population was less than 65 years of age), 50% were male, 63% were Caucasian, 12% were Asian and 9% were Black. Patients received moxifloxacin 400 mg once daily oral, intravenous, or sequentially (intravenous followed by oral). Treatment duration was usually 6 to 10 days, and the mean number of days on therapy was 9 days.

Discontinuation of moxifloxacin due to adverse reactions occurred in 5% of patients overall, 4% of patients treated with 400 mg PO, 4% with 400 mg intravenous and 8% with sequential therapy 400 mg oral/intravenous. The most common adverse reactions (>0.3%) leading to discontinuation with the 400 mg oral doses were nausea, diarrhea, dizziness, and vomiting. The most common adverse reaction leading to discontinuation with the 400 mg intravenous dose was rash.

The most common adverse reactions leading to discontinuation with the 400 mg intravenous/oral sequential dose were diarrhea, pyrexia. Adverse reactions occurring in 1% of moxifloxacin hydrochloride-treated patients and less common adverse reactions, occurring in 0.1 to 1% of moxifloxacin hydrochloride-treated patients, are shown in Tables 2 and Table 3, respectively. The most common adverse drug reactions (3%) are nausea, diarrhea, headache, and dizziness.

Table 2: Common (1% or more) Adverse Reactions Reported in Active-Controlled Clinical Trials with Moxifloxacin Hydrochloride System Organ Class Adverse Reactions % (N=14,981) Blood and Lymphatic System Disorders Anemia 1 Gastrointestinal Disorders Nausea 7 Diarrhea 6 Vomiting 2 Constipation 2 Abdominal pain 2 Dyspepsia 1 General Disorders and Administration Site Conditions Pyrexia 1 Investigations Alanine aminotransferase increased 1 Metabolism and Nutritional Disorder Hypokalemia 1 Nervous System Disorders Headache 4 Dizziness 3 Psychiatric Disorders Insomnia 2 Table 3: Less Common (0.1 to less than 1%) Adverse Reactions Reported in Active-Controlled Clinical Trials with Moxifloxacin Hydrochloride (N=14,981) System Organ Class Adverse Reactions Blood and Lymphatic System Disorders Thrombocythemia Eosinophilia Neutropenia Thrombocytopenia Leukopenia Leukocytosis Cardiac Disorders Atrial fibrillation Palpitations Tachycardia Angina pectoris Cardiac failure Cardiac arrest Bradycardia Ear and Labyrinth Disorders Vertigo Tinnitus Eye Disorders Vision blurred Gastrointestinal Disorders Dry mouth Abdominal discomfort Flatulence Abdominal distention Gastritis Gastroesophageal reflux disease General Disorders and Administration Site Conditions Fatigue Chest pain Asthenia Pain Malaise Infusion site extravasation Edema Chills Chest discomfort Facial pain Hepatobiliary disorders Hepatic function abnormal Infections and Infestations Candidiasis Vaginal infection Fungal infection Gastroenteritis Investigations Aspartate aminotransferase increased Gamma-glutamyltransferase increased Blood alkaline phosphatase increased Electrocardiogram QT prolonged Blood lactate dehydrogenase increased Blood amylase increased Lipase increased Blood creatinine increased Blood urea increased Hematocrit decreased Prothrombin time prolonged Eosinophil count increased Activated partial thromboplastin time prolonged Blood triglycerides increased Blood uric acid increased Metabolism and Nutrition Disorders Hyperglycemia Anorexia Hyperlipidemia Decreased appetite Dehydration Musculoskeletal and Connective Tissue Disorders Back pain Pain in extremity Arthralgia Muscle spasms Musculoskeletal pain Nervous System Disorders Dysgeusia Somnolence Tremor Lethargy Paresthesia Hypoesthesia Syncope Psychiatric Disorders Anxiety Confusional state Agitation Depression Nervousness Restlessness Hallucination Disorientation Renal and Urinary Disorders Renal failure Dysuria Reproductive System and Breast Disorders Vulvovaginal pruritus Respiratory, Thoracic, and Mediastinal Disorders Dyspnea Asthma Wheezing Bronchospasm Skin and Subcutaneous Tissue Disorders Rash Pruritus Hyperhidrosis Erythema Urticaria Dermatitis allergic Night sweats Vascular Disorders Hypertension Hypotension Phlebitis Laboratory Changes Changes in laboratory parameters, which are not listed above and which occurred in 2% or more of patients and at an incidence greater than in controls included: increases in mean corpuscular hemoglobin (MCH), neutrophils, white blood cells (WBCs), prothrombin time (PT) ratio, ionized calcium, chloride, albumin, globulin, bilirubin; decreases in hemoglobin, red blood cells (RBCs), neutrophils, eosinophils, basophils, glucose, oxygen partial pressure (pO 2 ), bilirubin, and amylase. It cannot be determined if any of the above laboratory abnormalities were caused by the drug or the underlying condition being treated.

Postmarketing Experience Table 4 below lists adverse reactions that have been identified

during post-approval use of moxifloxacin hydrochloride. 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 4: Postmarketing Reports of Adverse Drug Reactions System Organ Class Adverse Reactions Blood and Lymphatic System Disorders Agranulocytosis Pancytopenia Cardiac Disorders Ventricular tachyarrhythmias (including in very rare cases cardiac arrest and torsade de pointes, and usually in patients with concurrent severe underlying proarrhythmic conditions) Acute myocardial ischemia with or without myocardial infarction occurring as part of an allergic reaction Ear and Labyrinth Disorders Hearing impairment, including deafness (reversible in majority of cases) Eye Disorders Vision loss (especially in the course of CNS reactions, transient in majority of cases) Hepatobiliary Disorders Hepatitis (predominantly cholestatic) Hepatic failure (including fatal cases) Jaundice Acute hepatic necrosis Immune System Disorders Anaphylactic reaction Anaphylactic shock Angioedema (including laryngeal edema) Musculoskeletal and Connective Tissue Disorders Tendon rupture Nervous System Disorders Altered coordination Abnormal gait Myasthenia gravis (exacerbation of) Muscle weakness Peripheral neuropathy (that may be irreversible), polyneuropathy Psychiatric Disorders Psychotic reaction (very rarely culminating in self-injurious behavior, such as suicidal ideation/thoughts or suicide attempts Renal and Urinary Disorders Interstitial nephritis Respiratory, Thoracic and Mediastinal Disorders Allergic pneumonitis Skin and Subcutaneous Tissue Disorders Photosensitivity/phototoxicity reaction Stevens-Johnson syndrome Toxic epidermal necrolysis

Antacids, Sucralfate, Multivitamins and Other Products Containing Multivalent Cations Fluoroquinolones, including moxifloxacin

hydrochloride, form chelates with alkaline earth and transition metal cations. Oral administration of moxifloxacin hydrochloride with antacids containing aluminum or magnesium, with sucralfate, with metal cations such as iron, or with multivitamins containing iron or zinc, or with formulations containing divalent and trivalent cations such as didanosine buffered tablets for oral suspension or the pediatric powder for oral solution, may substantially interfere with the absorption of moxifloxacin hydrochloride, resulting in systemic concentrations considerably lower than desired. Therefore, moxifloxacin hydrochloride should be taken at least 4 hours before or 8 hours after these agents.

Warfarin Fluoroquinolones, including moxifloxacin hydrochloride, have been reported to enhance the anticoagulant

effects of warfarin or its derivatives in the patient population. In addition, infectious disease and its accompanying inflammatory process, age, and general status of the patient are risk factors for increased anticoagulant activity. Therefore the prothrombin time, International Normalized Ratio (INR), or other suitable anticoagulation tests should be closely monitored if moxifloxacin hydrochloride is administered concomitantly with warfarin or its derivatives.

Antidiabetic Agents Disturbances of blood glucose, including hyperglycemia and hypoglycemia, have been

reported in patients treated concomitantly with fluoroquinolones, including moxifloxacin hydrochloride, and an antidiabetic agent. Therefore, careful monitoring of blood glucose is recommended when these agents are co-administered. If a hypoglycemic reaction occurs, moxifloxacin hydrochloride should be discontinued and appropriate therapy should be initiated immediately.

Nonsteroidal Anti-Inflammatory Drugs

The concomitant administration of a nonsteroidal anti-inflammatory drug (NSAID) with a fluoroquinolone, including moxifloxacin hydrochloride, may increase the risks of CNS stimulation and convulsions.

Drugs that Prolong QT

There is limited information available on the potential for a pharmacodynamic interaction in humans between moxifloxacin hydrochloride and other drugs that prolong the QTc interval of the electrocardiogram. Sotalol, a Class III antiarrhythmic, has been shown to further increase the QTc interval when combined with high doses of intravenous moxifloxacin hydrochloride in dogs. Therefore, moxifloxacin hydrochloride should be avoided with Class IA and Class III antiarrhythmics.

Pregnancy Risk Summary There are no available human data establishing a drug associated risk with the use of moxifloxacin. Based on animal studies with moxifloxacin, moxifloxacin hydrochloride may cause fetal harm. Moxifloxacin did not cause fetal malformations when administered to pregnant rats (IV and oral), rabbits (IV), and monkeys (oral) at exposures that were 0.24 to 2.5 times of those at the human clinical dose (400 mg/day moxifloxacin hydrochloride). However, when moxifloxacin was administered to rats and rabbits during pregnancy and throughout lactation (rats only) at doses associated with maternal toxicity, decreased neonatal body weights, increased incidence of skeletal variations (rib and vertebra combined), and increased fetal loss were observed (see Data). Advise pregnant women of the potential risk to the fetus.

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

Data Animal Data Animal reproductive and development studies were done in rats, rabbits and cynomolgus macaques. Moxifloxacin did not cause fetal malformations when administered to pregnant rats during organogenesis (gestation days 6 to 17) at oral doses as high as 500 mg/kg/day or 0.24 times the maximum recommended human dose based on systemic exposure (AUC), but decreased fetal body weights and slightly delayed fetal skeletal development were observed. Intravenous administration of 80 mg/kg/day (approximately 2 times the maximum recommended human dose based on body surface area) to pregnant rats resulted in maternal toxicity and a marginal effect on fetal and placental weights and the appearance of the placenta (Gestation days 6 to 17). Fetal malformations were not observed at intravenous doses as high as 80 mg/kg/day (approximately 2 times the maximum recommended human dose based on body surface area) in litters of pregnant rats that received moxifloxacin during organogenesis (Gestation days 6 to 17). Intravenous administration of 20 mg/kg/day (approximately equal to the maximum recommended human oral dose based upon systemic exposure) to pregnant rabbits during organogenesis (gestation days 6 to 20) resulted in decreased fetal body weights and delayed fetal skeletal ossification.

When rib and vertebral malformations were combined, there was an increased fetal and litter incidence of these effects in rabbits. Signs of maternal toxicity in rabbits at this dose included mortality, abortions, marked reduction of food consumption, decreased water intake, body weight loss and hypoactivity. Fetal malformations were not observed when pregnant cynomolgus macaques were given oral doses as high as 100 mg/kg/day (2.5 times the maximum recommended human dose based upon systemic exposure) during organogenesis (gestation days 20 to 50). An increased incidence of smaller fetuses was observed at 100 mg/kg/day in macaques.

In a pre- and postnatal development study conducted in rats given oral doses from Gestation day 6, throughout gestation and rearing to Postpartum day 21, effects observed at 500 mg/kg/day (0.24 times the maximum recommended human dose based on systemic exposure (AUC)) included slight increases in duration of pregnancy and prenatal loss, reduced pup birth weight and decreased neonatal survival. Treatment-related maternal mortality occurred during gestation at 500 mg/kg/day in this study.

Pediatric Use Effectiveness in pediatric patients and adolescents less than 18 years of age has not been established. Moxifloxacin hydrochloride causes arthropathy in juvenile animals. Limited information on the safety of moxifloxacin hydrochloride in 301 pediatric patients is available from the cIAI trial.

Active Controlled Trial in Complicated Intra-Abdominal Infection (cIAI) The safety and efficacy of moxifloxacin hydrochloride in pediatric patients for the treatment of cIAI has not been demonstrated. Pediatric patients 3 months to <18 years of age (mean age of 12 ± 4 years) were enrolled in a single randomized, double-blind, active controlled trial in cIAI including appendicitis with perforation, abscesses and peritonitis. Pediatric patients were randomized (2:1) to receive either moxifloxacin hydrochloride or comparator.

This study enrolled 451 patients who received study medication, 301 treated with moxifloxacin, and 150 with comparator. Of the 301 pediatric patients treated with moxifloxacin hydrochloride, 15 were below the age of 6 years and 286 were between the ages of 6 to <18 years. Patients received sequential intravenous/oral moxifloxacin hydrochloride or comparator (intravenous ertapenem followed by oral amoxicillin/clavulanate) for 5 to 14 days (mean duration was 9 days with a range of 1 to 24 days). The overall adverse reaction profile in pediatric patients was comparable to that of adult patients.

The most frequently occurring adverse reactions in pediatric patients treated with moxifloxacin hydrochloride were QT prolongation 9.3% (28/301), vomiting, 6.6% (20/301), diarrhea 3.7% (11/301), arthralgia 3.0% (9/301), and phlebitis 2.7% (8/301) (see Table 5). Discontinuation of study drug due to an adverse reaction was reported in 5.3% (16/301) of moxifloxacin hydrochloride-treated patients versus 1.3% (2/150) of comparator-treated patients. The adverse reaction profile of moxifloxacin hydrochloride or comparator was similar across all age groups studied. Musculoskeletal adverse reactions were monitored and followed up to 5 years after the end of study treatment.

The rates of musculoskeletal adverse reactions were 4.3% (13/301) in the moxifloxacin hydrochloride-treated group versus 3.3% (5/150) in the comparator-treated group. The majority of musculoskeletal adverse reactions were reported between 12 and 53 weeks after start of study treatment with complete resolution at the end of the study. Table 5 Incidence (%) of Selected Adverse Reactions in ≥2.0% of Pediatric Patients Treated with Moxifloxacin Hydrochloride in cIAI Clinical Trial System Organ Class Adverse Reactions Moxifloxacin Hydrochloride N = 301 (%) Comparator N = 150 (%) Gastrointestinal disorders Abdominal pain 8 3 Diarrhea 11 1 Vomiting 20 12 General disorders and administration site conditions Pyrexia 6 4 Investigations Aspartate aminotransferase increased 2 3 Electrocardiogram QT prolonged 28 4 Musculoskeletal and connective tissue disorders Arthralgia 9 2 Nervous system disorders Headache 6 2 Vascular disorders Phlebitis 8 0 Clinical response was assessed at the test-of-cure visit (28 to 42 days after end of treatment). The clinical response rates observed in the modified intent to treat population were 83.9% (208/248) for moxifloxacin hydrochloride and 95.5% (127/133) for comparator; see Table 6. Table 6: Clinical Response Rates at 28 to 42 Days After End of Treatment in Pediatric Patients with cIAI 1 The modified intent-to-treat (mITT) population is defined as all subjects who were treated with at least one dose of study medication and who have at least one pre-treatment causative organism from the intra-abdominal site of infection or from blood cultures. 2 Difference in clinical cure rates (moxifloxacin hydrochloride - Comparator) and 95% confidence intervals, presented as percentages, are based on stratified analysis by age group using Mantel-Haenszel methods.

Moxifloxacin Hydrochloride n (%) Comparator n (%) Difference 2 (95% CI) mITT Population1 N=248 N=133 Cure 208 127 -12.2 (-17.9, -6.4) Failure 17 3 Indeterminate 21 3 Missing 2 0

Moxifloxacin tablets are contraindicated in persons with a history of hypersensitivity to moxifloxacin or any member of the quinolone class of antibacterials . Known hypersensitivity to moxifloxacin tablets or other quinolones

Single oral overdoses up to 2.8 g were not associated with any serious adverse events. In the event of acute overdose, empty the stomach and maintain adequate hydration. Monitor ECG due to the possibility of QT interval prolongation.

Carefully observe the patient and give supportive treatment. The administration of activated charcoal as soon as possible after oral overdose may prevent excessive increase of systemic moxifloxacin exposure. About 3% and 9% of the dose of moxifloxacin, as well as about 2% and 4.5% of its glucuronide metabolite are removed by continuous ambulatory peritoneal dialysis and hemodialysis, respectively.