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Methenamine Hippurate

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Overview

What is HIPREX?

Each yellow capsule-shaped tablet contains 1 g Methenamine Hippurate which is the Hippuric Acid Salt of Methenamine (hexamethylene tetramine). The tablet also contains inactive ingredients. FD&C Yellow No. 5 tartrazine,   , Magnesium Stearate, Povidone, and Saccharin Sodium.



What does HIPREX look like?



What are the available doses of HIPREX?

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What should I talk to my health care provider before I take HIPREX?

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How should I use HIPREX?

HIPREX is indicated for prophylactic or suppressive treatment of frequently recurring urinary tract infections when long-term therapy is considered necessary. This drug should only be used after eradication of the infection by other appropriate antimicrobial agents.

To reduce the development of drug-resistant bacteria and maintain the effectiveness of HIPREX and other antibacterial drugs, HIPREX should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

1 tablet (1.0 g) twice daily (morning and night) for adults and pediatric patients over 12 years of age. 1/2 to 1 tablet (0.5 to 1.0 g) twice daily (morning and night) for pediatric patients 6 to 12 years of age. Since the antibacterial activity of HIPREX is greater in acid urine, restriction of alkalinizing foods and medications is desirable. If necessary, as indicated by urinary pH and clinical response, supplemental acidification of the urine should be instituted. The efficacy of therapy should be monitored by repeated urine cultures.


What interacts with HIPREX?

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What are the warnings of HIPREX?

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What are the precautions of HIPREX?

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What are the side effects of HIPREX?

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What should I look out for while using HIPREX?

HIPREX (methenamine hippurate tablets USP) is contraindicated in patients with renal insufficiency, severe hepatic insufficiency, or severe dehydration. Methenamine preparations should not be given to patients taking sulfonamides because some sulfonamides may form an insoluble precipitate with formaldehyde in the urine.

Large doses of methenamine (8 grams daily for 3 to 4 weeks) have caused bladder irritation, painful and frequent micturition, albuminuria, and gross hematuria.


What might happen if I take too much HIPREX?

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How should I store and handle HIPREX?

XEOMIN is reconstituted prior to use with sterile preservative-free 0.9% Sodium Chloride Injection, USP XEOMIN should not be used if the reconstituted solution has a cloudy appearance or contains floccular or particulate matter.Any reconstituted toxin solution for injection that has been stored for more than 24 hours, as well as any unused solution for injection, should be discarded.XEOMIN is reconstituted prior to use with sterile preservative-free 0.9% Sodium Chloride Injection, USP XEOMIN should not be used if the reconstituted solution has a cloudy appearance or contains floccular or particulate matter.Any reconstituted toxin solution for injection that has been stored for more than 24 hours, as well as any unused solution for injection, should be discarded.XEOMIN is reconstituted prior to use with sterile preservative-free 0.9% Sodium Chloride Injection, USP XEOMIN should not be used if the reconstituted solution has a cloudy appearance or contains floccular or particulate matter.Any reconstituted toxin solution for injection that has been stored for more than 24 hours, as well as any unused solution for injection, should be discarded.1-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/20171-gram scored, capsule-shaped yellow tablets debossed MERRELL 277 in bottles of 100 (NDC 30698-277-01).Store at 68° to 77°F (20° to 25°C); excursions permitted to 59° to 86°F (15° to 30°C) [See USP Controlled Room Temperature].Dispense in well-closed, light-resistant container with child-resistant closure. Manufactured for and Distributed by:Product of India© 2017 Validus Pharmaceuticals LLC60029-01Rev. 12/2017


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Clinical Information

Chemical Structure

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Clinical Pharmacology

Non-Clinical Toxicology
HIPREX (methenamine hippurate tablets USP) is contraindicated in patients with renal insufficiency, severe hepatic insufficiency, or severe dehydration. Methenamine preparations should not be given to patients taking sulfonamides because some sulfonamides may form an insoluble precipitate with formaldehyde in the urine.

Large doses of methenamine (8 grams daily for 3 to 4 weeks) have caused bladder irritation, painful and frequent micturition, albuminuria, and gross hematuria.

Drug Interactions:

Prescribing HIPREX in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

1. Care should be taken to maintain an acid pH of the urine, especially when treating infections due to urea-splitting organisms such as and strains of .

2. In a few instances in one study, the serum transaminase levels were slightly elevated during treatment but returned to normal while the patients were still taking HIPREX. Because of this report, it is recommended that liver function studies be performed periodically on patients taking the drug, especially those with liver dysfunction.

3. Use in Pregnancy: In early pregnancy the safe use of HIPREX is not established. In the last trimester, safety is suggested, but not definitely proved. No adverse effects on the fetus were seen in studies in pregnant rats and rabbits.

HIPREX taken during pregnancy can interfere with laboratory tests of urine estriol (resulting in unmeasurably low values) when acid hydrolysis is used in the laboratory procedure. This interference is due to the presence in the urine of methenamine and/or formaldehyde. Enzymatic hydrolysis, in place of acid hydrolysis, will circumvent this problem.

4. This product contains FD&C Yellow No. 5 (tartrazine), which may cause allergic-type reactions (including bronchial asthma) in certain susceptible individuals. Although the overall incidence of FD&C Yellow No. 5 (tartrazine) sensitivity in the general population is low, it is frequently seen in patients who also have aspirin hypersensitivity.

Geriatric Use

Clinical studies of HIPREX did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal or cardiac function, and of concomitant disease or other drug therapy.

HIPREX is contraindicated in patients with renal insufficiency and severe hepatic insufficiency

Information for Patients

Patients should be counseled that antibacterial drugs including HIPREX should only be used to treat bacterial infections. They do not treat viral infections (e.g., the common cold). When HIPREX is prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by HIPREX or other antibacterial drugs in the future.

Minor adverse reactions have been reported in less than 3.5% of patients treated. These reactions have included nausea, upset stomach, dysuria, and rash.

To report SUSPECTED ADVERSE REACTIONS, contact Validus Pharmaceuticals LLC at 1-866-982-5438 (1-866-9VALIDUS) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

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Reference

This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"

While we update our database periodically, we cannot guarantee it is always updated to the latest version.

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Professional

Clonazepam Description Each single-scored tablet, for oral administration, contains 0.5 mg, 1 mg, or 2 mg Clonazepam, USP, a benzodiazepine. Each tablet also contains corn starch, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and povidone. Clonazepam tablets USP 0.5 mg contain Yellow D&C No. 10 Aluminum Lake. Clonazepam tablets USP 1 mg contain Yellow D&C No. 10 Aluminum Lake, as well as FD&C Blue No. 1 Aluminum Lake. Chemically, Clonazepam, USP is 5-(o-chlorophenyl)-1,3-dihydro-7-nitro-2H-1,4-benzodiazepin-2-one. It is a light yellow crystalline powder. It has the following structural formula: C15H10ClN3O3 M.W. 315.72
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Interactions

Interactions

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