Drug Detail:Urispas (Flavoxate [ flah-vox-ate ])
Drug Class: Urinary antispasmodics
Urispas Description
URISPAS® (flavoxate HCl) tablets contain flavoxate hydrochloride, a synthetic urinary tract spasmolytic.
Chemically, flavoxate hydrochloride is 2-piperidinoethyl 3-methyl-4-oxo-2-phenyl-4H-1-benzopyran-8-carboxylate hydrochloride. The empirical formula of flavoxate hydrochloride is C24H25NO4• HCl. The molecular weight is 427.94. The structural formula appears below.
URISPAS® is supplied in tablets for oral administration. Each round, white, film-coated URISPAS® tablet is debossed with the product name URISPAS® and contains flavoxate hydrochloride, 100 mg. Inactive ingredients consist of calcium phosphate, hypromellose, magnesium stearate, polyethylene glycol, starch and talc.
Urispas - Clinical Pharmacology
Flavoxate hydrochloride counteracts smooth muscle spasm of the urinary tract and exerts its effect directly on the muscle.
In a single study of 11 normal male subjects, the time to onset of action was 55 minutes. The peak effect was observed at 112 minutes. 57% of the flavoxate HCl was excreted in the urine within 24 hours.
Indications and Usage for Urispas
URISPAS® (flavoxate HCl) is indicated for symptomatic relief of dysuria, urgency, nocturia, suprapubic pain, frequency and incontinence as may occur in cystitis, prostatitis, urethritis, urethrocystitis/urethrotrigonitis. URISPAS® is not indicated for definitive treatment, but is compatible with drugs used for the treatment of urinary tract infections.
Contraindications
URISPAS® (flavoxate HCl) is contraindicated in patients who have any of the following obstructive conditions: pyloric or duodenal obstruction, obstructive intestinal lesions or ileus, achalasia, gastrointestinal hemorrhage and obstructive uropathies of the lower urinary tract.
Precautions
Information for Patients:
Patients should be informed that if drowsiness and blurred vision occur, they should not operate a motor vehicle or machinery or participate in activities where alertness is required.
Carcinogenesis, Mutagenesis, Impairment of Fertility:
Mutagenicity studies and long-term studies in animals to determine the carcinogenic potential of URISPAS® (flavoxate HCl) have not been performed.
Pregnancy:
Teratogenic Effects-Pregnancy Category B. Reproduction studies have been performed in rats and rabbits at doses up to 34 times the human dose and revealed no evidence of impaired fertility or harm to the fetus due to flavoxate HCl. There are, however, no well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
Adverse Reactions/Side Effects
The following adverse reactions have been observed, but there are not enough data to support an estimate of their frequency.
Gastrointestinal: Nausea, vomiting, dry mouth.
CNS: Vertigo, headache, mental confusion, especially in the elderly, drowsiness, nervousness.
Hematologic: Leukopenia (one case which was reversible upon discontinuation of the drug).
Cardiovascular: Tachycardia and palpitation.
Allergic: Urticaria and other dermatoses, eosinophilia and hyperpyrexia.
Ophthalmic: Increased ocular tension, blurred vision, disturbance in eye accommodation.
Renal: Dysuria.
Overdosage
The oral LD50 for flavoxate HCl in rats is 4273 mg/kg. The oral LD50 for flavoxate HCl in mice is 1837 mg/kg.
It is not known whether flavoxate HCl is dialyzable.
How is Urispas supplied
URISPAS® (flavoxate HCl), 100 mg, is supplied as round, white, film-coated tablets, debossed with the product name URISPAS® in bottles of 100.
100 mg 100's: NDC 17314-9220-1
Store between 15° and 30°C (59° and 86°F).
Rx only
Revision Date: AUGUST 2004
Manufactured by
Cardinal Health
Winchester, Kentucky 40391
Distributed by
ORTHO-McNEIL PHARMACEUTICAL, INC.
Raritan, New Jersey 08869
Printed in U.S.A.
631-10-843-2
| URISPAS
flavoxate hydrochloride tablet, film coated |
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| Labeler - ORTHO-McNEIL PHARMACEUTICAL, INC. |
