The safety and efficacy of oxybutynin chloride was evaluated in a total of 199 patients in three clinical trials. These participants were treated with oxybutynin chloride 5 to 20 mg/day for up to 6 weeks.
Table 3 shows the incidence of adverse events judged by investigators to be at least possibly related to treatment and reported by at least 5% of patients.
Table 3 Incidence (%) of Adverse Events Reported by ≥ 5% of Patients Using Oxybutynin Chloride (5 to 20 mg/day)
Body System | Adverse Event | Oxybutynin Chloride (5 to 20 mg/day) (n=199) |
Infections and Infestations | Urinary tract infection | 6.5% |
Psychiatric Disorders | Insomnia Nervousness | 5.5% 6.5% |
Nervous System Disorders | Dizziness Somnolence Headache | 16.6% 14.0% 7.5% |
Eye Disorders | Blurred vision | 9.6% |
Gastrointestinal Disorders | Dry mouth Constipation Nausea Dyspepsia | 71.4% 15.1% 11.6% 6.0% |
Renal and Urinary Disorders | Urinary Hesitation Urinary Retention | 8.5% 6.0% |
The most common adverse events reported by patients receiving oxybutynin chloride 5 to 20 mg/day were the expected side effects of anticholinergic agents. The incidence of dry mouth was dose-related.
In addition, the following adverse events were reported by 1 to < 5% of patients using oxybutynin chloride (5 to 20 mg/day) in all studies.
Infections and Infestations: nasopharyngitis, upper respiratory tract infection, bronchitis, cystitis, fungal infection;
Metabolism and Nutrition Disorders: fluid retention;
Psychiatric Disorders: confusional state;
Nervous System Disorders: dysgeusia, sinus headache;
Eye Disorders: keratoconjunctivitis sicca, eye irritation;
Cardiac Disorders: palpitations, sinus arrhythmia;
Vascular Disorders: flushing;
Respiratory, Thoracic and Mediastinal Disorders: nasal dryness, cough, pharyngolaryngeal pain, dry throat, sinus congestion, hoarseness, asthma, nasal congestion;
Gastrointestinal Disorders: diarrhea, abdominal pain, loose stools, flatulence, vomiting, abdominal pain upper, dysphagia, aptyalism, eructation, tongue coated;
Skin and Subcutaneous Tissue Disorders: dry skin, pruritis;
Musculoskeletal and Connective Tissue Disorders: back pain, arthralgia, pain in extremity, flank pain;
Renal and Urinary Disorders: dysuria, pollakiuria;
General Disorders and Administration Site Conditions: fatigue, edema peripheral, asthenia, pain, thirst, edema;
Investigations: blood pressure increased, blood glucose increased, blood pressure decreased;
Injury, Poisoning, and Procedural Complications: fall.
Postmarketing Surveillance
Because postmarketing adverse events 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. The following additional adverse events have been reported from worldwide postmarketing experience with oxybutynin chloride:
Psychiatric Disorders: psychotic disorder, agitation, hallucination, memory impairment;
Nervous System Disorders: convulsions;
Eye Disorders: cycloplegia, mydriasis, glaucoma;
Cardiac Disorders: tachycardia, QT interval prolongation; chest discomfort ;
Gastrointestinal Disorders: decreased gastrointestinal motility; frequent bowel movements;
Skin and Subcutaneous Tissue Disorders: rash, decreased sweating;
Renal and Urinary Disorders: impotence;
Reproductive System and Breast Disorders: suppression of lactation;
General Disorders and Administration Site Conditions: hypersensitivity reactions, including angioedema with airway obstruction, urticaria, and face edema; rare anaphylactic reactions requiring hospitalization for emergency treatment;
Metabolism and Nutrition Disorders: anorexia;
Respiratory, Thoracic and Mediastinal Disorders: dysphonia.
To report SUSPECTED ADVERSE REACTIONS, contact Strides Pharma Inc. at 1-877-244-9825 or go to
www.strides.com or FDA at 1-800-FDA-1088 or
www.fda.gov/medwatch.