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 3shows 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 3Incidence (%) 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 SurveillanceBecause 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 AvKARE at 1-855-361-3993 or go to
www.avkare.com or FDA at 1-800-FDA-1088 or
www.fda.gov/medwatch.