OXYBUTYNIN CHLORIDE 5 mg Tablet, 30-count
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Cholinergic Muscarinic Antagonist class.
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🏭 Manufacturer & labeler
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🩺 Clinical
Oxybutynin is used to treat overactive bladder (a bladder condition that causes sudden urges to urinate that may be hard to control) and to control bladder muscles weakened in certain nerve conditions. Oxybutynin is in a class of medications called anticholinergics/antimuscarinics. It works by relaxing the bladder muscles.
Read the full MedlinePlus article ↗- Oxybutynin calms down an overactive bladder by relaxing the bladder muscle and reducing those sudden, hard-to-ignore urges to go. Over time, most people find they have fewer urgent...
- What exactly is oxybutynin supposed to do for me?
- Yes, dry mouth is the most common side effect of oxybutynin — and it's more noticeable with the immediate-release tablets than the extended-release form. Sipping water throughout t...
- My mouth is incredibly dry since starting this — is that normal?
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Supplement & herbal interactions
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💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
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UNII LMI26O6933
Alumina is a white powder form of aluminum oxide. It's used as a filler to add bulk to tablets and capsules, and sometimes as a thickening or anti-caking agent in powdered formulations.
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UNII 3SY5LH9PMK
Anhydrous lactose is a milk sugar with no water content. It acts as a filler and binder in tablets and capsules, adding bulk and helping ingredients stick together.
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UNII 776XM7047L
Calcium stearate is a white powder derived from stearic acid and calcium. It works as a lubricant and glidant to help the medicine flow smoothly during manufacturing and prevent ingredients from sticking to equipment.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII H3R47K3TBD
FD&C Blue No. 1 is a synthetic blue dye approved for use in foods and medicines. It serves as a colorant to give the medication its distinctive appearance and help with product identification.
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UNII 5856J3G2A2
A starch-based powder made from potatoes and processed with sodium. It acts as a disintegrant, helping the tablet or capsule break apart quickly in the stomach so the medicine can be absorbed.
6 inactive ingredients listed in the exact product block matched to this NDC.
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ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · Q2 2026 | $0.1412 | $4.24 / 30 tablets |
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🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Oxybutynin Chloride 5 mg 00832-0038-00 | Upsher-Smith | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 00904-7027-61 | Major | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 10702-0201-01 | KVK-Tech, | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 23155-0810-01 | Heritage | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 50111-0456-01 | Teva | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 52817-0260-10 | TruPharma | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 60687-0899-01 | American | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 64380-0162-01 | Strides | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 64980-0431-01 | RISING | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 69315-0182-01 | Leading | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 70954-0005-10 | ANI | 100 tablets | $0.047 | AB | Availability likely | — |
| Oxybutynin Chloride 5 mg 00615-8492-05 | NCS | 15 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 23155-0913-01 | Heritage | 100 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 42291-0456-50 | AvKARE | 500 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 43063-0851-01 | PD-Rx | 100 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 43063-0931-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 43353-0978-92 | Aphena | 270 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-4622-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-6199-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-6638-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-6966-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-6967-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 50090-7766-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 51407-0099-01 | Golden | 100 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 51655-0665-25 | Northwind | 60 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 55154-2632-00 | Cardinal | 10 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 63187-0749-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 64380-0781-03 | Strides | 60 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 64980-0679-01 | RISING | 100 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 66267-0642-30 | NuCare | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 67296-2045-03 | Redpharm | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 68788-8141-09 | Preferred | 90 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 70518-2640-00 | REMEDYREPACK | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71335-0519-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71335-1014-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71335-1494-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71610-0277-53 | Aphena | 60 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71610-0394-53 | Aphena | 60 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 71610-0860-30 | Aphena | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mgthis 72189-0130-30 | direct | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 72789-0417-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 72789-0490-60 | PD-Rx | 60 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 82868-0047-30 | Northwind | 30 tablets | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 83939-0022-01 | VERITYRX, | 1 tablet | — | AB | FDA listed | — |
| Oxybutynin Chloride 5 mg 67046-1381-03 | Coupler | 30 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
Top reported reactions
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 72189-0130-30 You're viewing this | 30 TABLET in 1 BOTTLE (72189-130-30) | 2020-11-11 | Active |
🧭 About this NDC listing & data coverage
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | ✓ Available |
| Inactive ingredients (structured) | ✓ Available |
| NADAC pharmacy acquisition price (CMS) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
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📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
Oxybutynin chloride extended-release tablets are muscarinic antagonist indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency. Oxybutynin chloride extended-release tablets are also indicated for the treatment of pediatric patients aged 6 years and older with symptoms of detrusor overactivity associated with a neurological condition (e.g., spina bifida).
⏱️ Dosage and Administration ▾
Oxybutynin chloride extended-release tablets must be swallowed whole with the aid of liquids, and must not be chewed, divided, or crushed. Oxybutynin chloride extended-release tablets may be administered with or without food.
2.1Adults The recommended starting dose of Oxybutynin chloride extended-release tablet is 5 or 10 mg once daily at approximately the same time each day. Dosage may be adjusted in 5-mg increments to achieve a balance of efficacy and tolerability (up to a maximum of 30 mg/day). In general, dosage adjustment may proceed at approximately weekly intervals.
2.2Pediatric Patients Aged 6 Years of Age and Older The recommended starting dose of oxybutynin chloride extended-release tablet is 5 mg once daily at approximately the same time each day. Dosage may be adjusted in 5-mg increments to achieve a balance of efficacy and tolerability (up to a maximum of 20 mg/day).
💊 Dosage Forms and Strengths ▾
Oxybutynin chloride extended-release tablets, USP are available as 5, 10 and 15 mg tablets for oral use: 5 mg: Pale yellow colored, round shaped, biconvex coated tablets imprinted with "EM1" on one side and plain on other side. 10 mg: Pink colored, round shaped, biconvex coated tablets imprinted with "EM2" on one side and plain on other side. 15 mg: Grey colored, round shaped, biconvex coated tablets imprinted with "EM3" on one side and plain on other side.
⛔ Contraindications ▾
Oxybutynin chloride extended-release tablets are contraindicated in patients with urinary retention, gastric retention and other severe decreased gastrointestinal motility conditions, uncontrolled narrow-angle glaucoma. Oxybutynin chloride extended-release tablets are also contraindicated in patients who have demonstrated hypersensitivity to the drug substance or other components of the product. There have been reports of hypersensitivity reactions, including anaphylaxis and angiodema.
⚠️ Warnings and Cautions ▾
5.1Angioedema Angioedema of the face, lips, tongue and/or larynx has been reported with oxybutynin. In some cases, angioedema occurred after the first dose. Angioedema associated with upper airway swelling may be life-threatening. If involvement of the tongue, hypopharynx, or larynx occurs, oxybutynin should be promptly discontinued and appropriate therapy and/or measures necessary to ensure a patent airway should be promptly provided.
5.2Central Nervous System Effects Oxybutynin is associated with anticholinergic central nervous system (CNS) effects [see ADVERSE REACTIONS (6)] . A variety of CNS anticholinergic effects have been reported, including hallucinations, agitation, confusion and somnolence. Patients should be monitored for signs of anticholinergic CNS effects, particularly in the first few months after beginning treatment or increasing the dose.
Advise patients not to drive or operate heavy machinery until they know how oxybutynin chloride extended-release tablet affects them. If a patient experiences anticholinergic CNS effects, dose reduction or drug discontinuation should be considered. Oxybutynin chloride extended-release tablets should be used with caution in patients with preexisting dementia treated with cholinesterase inhibitors due to the risk of aggravation of symptoms.
Oxybutynin chloride extended-release tablets should be used with caution in patients with Parkinson’s disease due to the risk of aggravation of symptoms.
5.3Worsening of Symptoms of Myasthenia Gravis Oxybutynin chloride extended-release tablets should be used with caution in patients with myasthenia gravis due to the risk of aggravation of symptoms.
5.4Worsening of Symptoms of Decreased Gastrointestinal Motility in Patients with Autonomic Neuropathy Oxybutynin chloride extended-release tablets should be used with caution in patients with autonomic neuropathy due to the risk of aggravation of symptoms of decreased gastrointestinal motility.
5.5Urinary Retention Oxybutynin chloride extended-release tablets should be administered with caution to patients with clinically significant bladder outflow obstruction because of the risk of urinary retention [see CONTRAINDICATIONS (4)] .
5.6Gastrointestinal Adverse Reactions Oxybutynin chloride extended-release tablets should be administered with caution to patients with gastrointestinal obstructive disorders because of the risk of gastric retention [see CONTRAINDICATIONS (4)] . Oxybutynin chloride extended-release tablets, like other anticholinergic drugs, may decrease gastrointestinal motility and should be used with caution in patients with conditions such as ulcerative colitis and intestinal atony. Oxybutynin chloride extended-release tablets should be used with caution in patients who have gastroesophageal reflux and/or who are concurrently taking drugs (such as bisphosphonates) that can cause or exacerbate esophagitis.
As with any other nondeformable material, caution should be used when administering oxybutynin chloride extended-release tablets to patients with preexisting severe gastrointestinal narrowing (pathologic or iatrogenic). There have been rare reports of obstructive symptoms in patients with known strictures in association with the ingestion of other drugs in nondeformable controlled-release formulations.
🤒 Adverse Reactions ▾
6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, the 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 clinical practice. The safety and efficacy of oxybutynin chloride extended-release tablets (5 to 30 mg/day) was evaluated in 774 adult subjects who participated in five double-blind, controlled clinical trials. In four of the five studies, oxybutynin IR (5 to 20 mg/day in 199 subjects) was an active comparator.
Adverse reactions reported by ≥ 1% of subjects are shown in Table 1. Table 1: Adverse Drug Reactions Reported by ≥ 1% of Oxybutynin Chloride Extended-Release Tablets-treated Adult Subjects in Five Double-blind, Controlled Clinical Trials of Oxybutynin Chloride Extended-Release Tablets System/Organ Class Preferred Term Oxybutynin ER 5 to 30 mg/day n = 774 % Oxybutynin IR * 5 to 20 mg/day n = 199 % * IR = immediate release † The bundled term residual urine volume consists of the preferred terms residual urine volume and residual urine volume increased.
Psychiatric Disorders Insomnia 3.0
5.5Nervous System Disorders Headache 7.5
8.0Somnolence 5.6
14.1Dizziness 5.0
16.6Dysgeusia 1.6
1.5Eye Disorders Vision blurred 4.3
9.6Dry eye 3.1
2.5Respiratory, Thoracic and Mediastinal Disorders Cough 1.9
3.0Oropharyngeal pain 1.9
1.5Dry throat 1.7
2.5Nasal dryness 1.7
4.5Gastrointestinal Disorders Dry mouth 34.9
72.4Constipation 8.7
15.1Diarrhea 7.9
6.5Dyspepsia 4.5
6.0Nausea 4.5
11.6Abdominal pain 1.6
2.0Vomiting 1.3
1.5Flatulence 1.2
2.5Gastro-esophageal reflux disease 1.0
0.5Skin and Subcutaneous Tissue Disorders Dry skin 1.8
2.5Pruritus 1.3
1.5Renal and Urinary Disorders Dysuria 1.9
2.0Urinary hesitation 1.9
8.5Urinary retention 1.2
3.0General Disorders and Administration Site Conditions Fatigue 2.6
3.0Investigations Residual urine volume † 2.3
3.5The discontinuation rate due to adverse reactions was 4.4% with oxybutynin ER compared to 0% with oxybutynin IR. The most frequent adverse reaction causing discontinuation of study medication was dry mouth (0.7% ). The following adverse reactions were reported by <1% of oxybutynin chloride extended-release tablets-treated patients and at a higher incidence than placebo in clinical trials: Metabolism and Nutrition Disorders: anorexia, fluid retention; Vascular disorders: hot flush; Respiratory, thoracic and mediastinal disorders: dysphonia; Gastrointestinal Disorders: dysphagia, frequent bowel movements; General disorders and administration site conditions: chest discomfort, thirst.
6.2Postmarketing Experience The following additional adverse reactions have been reported from worldwide postmarketing experience with oxybutynin chloride extended-release tablets. Because postmarketing 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. Infections and Infestations: Urinary tract infection; Psychiatric Disorders: psychotic disorder, agitation, confusional state, hallucinations, memory impairment, abnormal behavior; Nervous System Disorders: convulsions; Eye Disorders: glaucoma; Respiratory, Thoracic and Mediastinal Disorders: nasal congestion; Cardiac Disorders: arrhythmia, tachycardia, palpitations, QT interval prolongation; Vascular Disorders: flushing, hypertension; Skin and Subcutaneous Tissue Disorders: rash; Renal and Urinary Disorders: impotence; General Disorders and Administration Site Conditions: hypersensitivity reactions, including angioedema with airway obstruction, urticaria, and face edema; anaphylactic reactions requiring hospitalization for emergency treatment; Injury, poisoning and procedural complications: fall.
Additional adverse events reported with some other oxybutynin chloride formulations include: cycloplegia, mydriasis, and s…
🔄 Drug Interactions ▾
The concomitant use of oxybutynin with other anticholinergic drugs or with other agents which produce dry mouth, constipation, somnolence (drowsiness), and/or other anticholinergic-like effects may increase the frequency and/or severity of such effects. Anticholinergic agents may potentially alter the absorption of some concomitantly administered drugs due to anticholinergic effects on gastrointestinal motility. This may be of concern for drugs with a narrow therapeutic index.
Anticholinergic agents may also antagonize the effects of prokinetic agents, such as metoclopramide. Mean oxybutynin chloride plasma concentrations were approximately 2 fold higher when oxybutynin chloride extended-release tablet was administered with ketoconazole, a potent CYP3A4 inhibitor. Other inhibitors of the cytochrome P450 3A4 enzyme system, such as antimycotic agents (e.g., itraconazole and miconazole) or macrolide antibiotics (e.g., erythromycin and clarithromycin), may alter oxybutynin mean pharmacokinetic parameters (i.e., C max and AUC).
The clinical relevance of such potential interactions is not known. Caution should be used when such drugs are co-administered.
👥 Use in Specific Populations ▾
8.1Pregnancy Pregnancy Category B. There are no adequate and well-controlled studies using oxybutynin chloride extended-release tablets in pregnant women. Oxybutynin chloride extended-release tablets should be used during pregnancy only if the potential benefit to the patient outweighs the risk to the patient and fetus.
Women who become pregnant during oxybutynin chloride extended-release tablets treatment are encouraged to contact their physician. Risk Summary Based on animal data, oxybutynin is predicted to have a low probability of increasing the risk of adverse developmental effects above background risk. Animal Data Reproduction studies with oxybutynin chloride in the mouse, rat, hamster, and rabbit showed no evidence of impaired fertility or harm to the animal fetus.
8.3Nursing Mothers It is not known whether oxybutynin is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when oxybutynin chloride extended-release tablets are administered to a nursing woman.
8.4Pediatric Use The safety and efficacy of oxybutynin chloride extended-release tablets were studied in 60 children in a 24-week, open-label, non-randomized trial. Patients were aged 6 to 15 years, all had symptoms of detrusor overactivity in association with a neurological condition (e.g., spina bifida), all used clean intermittent catheterization, and all were current users of oxybutynin chloride. Study results demonstrated that administration of oxybutynin chloride extended-release tablets 5 to 20 mg/day was associated with an increase from baseline in mean urine volume per catheterization from 108 mL to 136 mL, an increase from baseline in mean urine volume after morning awakening from 148 mL to 189 mL, and an increase from baseline in the mean percentage of catheterizations without a leaking episode from 34% to 51%.
Urodynamic results were consistent with clinical results. Administration of oxybutynin chloride extended-release tablets resulted in an increase from baseline in mean maximum cystometric capacity from 185 mL to 254 mL, a decrease from baseline in mean detrusor pressure at maximum cystometric capacity from 44 cm H 2O to 33 cm H 2O, and a reduction in the percentage of patients demonstrating uninhibited detrusor contractions (of at least 15 cm H 2O) from 60% to 28%. The pharmacokinetics of oxybutynin chloride extended-release tablets in these patients were consistent with those reported for adults [see CLINICAL PHARMACOLOGY (12.3)] .
Oxybutynin chloride extended-release tablets are not recommended in pediatric patients who cannot swallow the tablet whole without chewing, dividing, or crushing, or in children under the age of 6.
8.5Geriatric Use The rate and severity of anticholinergic effects reported by patients less than 65 years old and those 65 years and older were similar. The pharmacokinetics of oxybutynin chloride extended-release tablets were similar in all patients studied (up to 78 years of age).
8.6Renal Impairment There were no studies conducted with oxybutynin chloride extended-release tablets in patients with renal impairment.
8.7Hepatic Impairment There were no studies conducted with oxybutynin chloride extended-release tablets in patients with hepatic impairment.
🆘 Overdosage ▾
The continuous release of oxybutynin from oxybutynin chloride extended-release tablets should be considered in the treatment of overdosage. Patients should be monitored for at least 24 hours. Treatment should be symptomatic and supportive.
A cathartic may be administered. Overdosage with oxybutynin chloride has been associated with anticholinergic effects including central nervous system excitation, flushing, fever, dehydration, cardiac arrhythmia, vomiting, and urinary retention. Ingestion of 100 mg oxybutynin chloride in association with alcohol has been reported in a 13-year-old boy who experienced memory loss, and a 34-year-old woman who developed stupor, followed by disorientation and agitation on awakening, dilated pupils, dry skin, cardiac arrhythmia, and retention of urine.
Both patients fully recovered with symptomatic treatment.
🧬 Clinical Pharmacology ▾
12.1Mechanism of Action Oxybutynin relaxes bladder smooth muscle. Oxybutynin chloride exerts a direct antispasmodic effect on smooth muscle and inhibits the muscarinic action of acetylcholine on smooth muscle. No blocking effects occur at skeletal neuromuscular junctions or autonomic ganglia (antinicotinic effects).
Antimuscarinic activity resides predominantly in the R-isomer. A metabolite, desethyloxybutynin, has pharmacological activity similar to that of oxybutynin in in vitro studies.
12.2Pharmacodynamics In patients with conditions characterized by involuntary bladder contractions, cystometric studies have demonstrated that oxybutynin increases bladder (vesical) capacity, diminishes the frequency of uninhibited contractions of the detrusor muscle, and delays the initial desire to void.
12.3Pharmacokinetics Absorption Following the first dose of oxybutynin chloride extended-release tablets oxybutynin plasma concentrations rise for 4 to 6 hours; thereafter steady concentrations are maintained for up to 24 hours, minimizing fluctuations between peak and trough concentrations associated with oxybutynin. The relative bioavailabilities of R- and S-oxybutynin from oxybutynin chloride extended-release tablets are 156% and 187%, respectively, compared with oxybutynin. The mean pharmacokinetic parameters for R- and S-oxybutynin are summarized in Table 2.
The plasma concentration-time profiles for R- and S-oxybutynin are similar in shape; Figure 1 shows the profile for R-oxybutynin. Table 2: Mean (SD) R- and S-Oxybutynin Pharmacokinetic Parameters Following a Single Dose of Oxybutynin Chloride Extended-Release Tablets 10 mg (n=43) Parameters (units) R-Oxybutynin S-Oxybutynin C max (ng/mL) 1.0 (0.6) 1.8 (1.0) T max (h) 12.7 (5.4) 11.8 (5.3) t 1/2 (h) 13.2 (6.2) 12.4 (6.1) AUC (0–48) (ng∙h/mL) 18.4 (10.3) 34.2 (16.9) AUC inf (ng∙h/mL) 21.3 (12.2) 39.5 (21.2) Figure 1: Mean R-oxybutynin plasma concentrations following a single dose of oxybutynin chloride extended-release tablets 10 mg and oxybutynin 5 mg administered every 8 hours (n=23 for each treatment). [Figure 1] Steady state oxybutynin plasma concentrations are achieved by Day 3 of repeated oxybutynin chloride extended-release tablets dosing, with no observed drug accumulation or change in oxybutynin and desethyloxybutynin pharmacokinetic parameters.
Oxybutynin chloride extended-release tablets steady state pharmacokinetics were studied in 19 children aged 5 to 15 years with detrusor overactivity associated with a neurological condition (e.g., spina bifida). The children were on oxybutynin chloride extended-release tablets total daily dose ranging from 5 to 20 mg (0.10 to 0.77 mg/kg). Sparse sampling technique was used to obtain serum samples.
When all available data are normalized to an equivalent of 5 mg per day of oxybutynin chloride extended-release tablets, the mean pharmacokinetic parameters derived for R- and S-oxybutynin and R- and S-desethyloxybutynin are summarized in Table 3. The plasma-time concentration profiles for R- and S-oxybutynin are similar in shape; Figure 2 shows the profile for R-oxybutynin when all available data are normalized to an equivalent of 5 mg per day. Table 3: Mean ± SD R- and S-Oxybutynin and R- and S-Desethyloxybutynin Pharmacokinetic Parameters in Children Aged 5 to 15 Following Administration of 5 to 20 mg Oxybutynin Chloride Extended-Release Tablets Once Daily (n=19), All Available Data Normalized to an Equivalent of Oxybutynin Chloride Extended-Release Tablets 5 mg Once Daily R-Oxybutynin S-Oxybutynin R- Desethyloxybutynin S- Desethyloxybutynin C max (ng/mL) 0.7 ± 0.4 1.3 ± 0.8 7.8 ± 3.7 4.2 ±
2.3T max (h) 5.0 5.0 5.0
5.0AUC (ng∙h/mL) 12.8 ± 7.0 23.7 ± 14.4 125.1 ± 66.7 73.6 ±
47.7Figure 2: Mean steady state (± SD) R-oxybutynin plasma concentrations following administration of 5 to 20 mg oxybutynin chloride extended-release tablets once daily in children aged 5 to 15. Plot represents all available data normalized to an equivalent of…
📦 How Supplied / Storage and Handling ▾
Oxybutynin chloride extended-release tablets, USP are available in three dosage strengths, 5 mg (pale yellow), 10 mg (pink), and 15 mg (grey) and are imprinted on one side with "EM1", "EM2", or "EM3" with black ink. Oxybutynin chloride extended-release tablets, USP are supplied in bottles of 30, 100, 500 and 1,000 tablets. 5 mg 30 count bottle Storage Store at 25°C (77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].
Protect from moisture and humidity. Keep out of reach of children.
📋 Description ▾
Oxybutynin chloride extended-release tablet, USP is an antispasmodic, muscarinic antagonist. Each oxybutynin chloride extended-release tablet, USP contains 5 mg, 10 mg, or 15 mg of oxybutynin chloride USP, formulated as a once-a-day controlled-release tablet for oral administration. Oxybutynin chloride is administered as a racemate of R- and S-enantiomers.
Chemically, oxybutynin chloride is d,l (racemic) 4-diethylamino-2-butynyl phenylcyclohexylglycolate hydrochloride. The empirical formula of oxybutynin chloride is C 22H 31NO 3•HCl. Its structural formula is: [Chemical Structure] Oxybutynin chloride is a white crystalline solid with a molecular weight of 393.9.
It is readily soluble in water and acids, but relatively insoluble in alkalis. Oxybutynin chloride extended-release tablets, USP contains the following inert ingredients: colloidal anhydrous silicon dioxide, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer type-c, microcrystalline cellulose, polyethylene glycol, sodium bicarbonate, sodium lauryl sulfate, talc, titanium dioxide, triethyl citrate. Coloring agents are ferric oxide yellow (in all strengths), ferric oxide red (in 5 mg and 10 mg only) and ferric oxide black (in 15 mg only).
System Components and Performance Oxybutynin chloride extended-release tablets, USP are formulated to deliver oxybutynin chloride at a controlled rate over approximately 24 hours. The dosage form is comprised of a hydrophilic cellulose polymer matrix tablet surrounded by an enteric coating system. The enteric coat is insoluble in the low pH environment of the stomach.
As the tablet passes through the stomach and enters the higher pH environment of the small intestine, the enteric coating dissolves and/or erodes to expose the polymer matrix tablet which swells and releases drug at a controlled rate via diffusion and/or erosion. Oxybutynin chloride extended-release tablets, USP meets USP dissolution test 5.
💬 Medication Guide ▾
For more information, go to www.accordhealthcare.us or call Accord Healthcare Inc. at 1-866-941-7875. Manufactured For: Accord Healthcare, Inc., 1009 Slater Road, Suite 210-B, Durham, NC 27703, USA. Manufactured By: Intas Pharmaceuticals Limited, Plot No. : 457, 458, Village – Matoda, Bavla Road, Ta.- Sanand, Dist.- Ahmedabad – 382 210, INDIA. 10 1091 1 697321 Issued May 2019