Hiprex

prophylaxis of urinary tract infections, Urinary Tract Infections

Treatment

2 FDA approvals

9 Active Studies for Hiprex

What is Hiprex

Methenamine

The Generic name of this drug

Treatment Summary

Methenamine is an organic compound with a unique structure. In its salt form, it is used to treat urinary tract infections. One example is methenamine hippurate, which is the hippuric acid salt of methenamine.

Hiprex

is the brand name

image of different drug pills on a surface

Hiprex Overview & Background

Brand Name

Generic Name

First FDA Approval

How many FDA approvals?

Hiprex

Methenamine

1976

17

Approved as Treatment by the FDA

Methenamine, commonly known as Hiprex, is approved by the FDA for 2 uses such as prophylaxis of urinary tract infections and Urinary Tract Infections .

prophylaxis of urinary tract infections

Urinary Tract Infections

Effectiveness

How Hiprex Affects Patients

Taking 1 gram of methenamine hippurate produces an antibacterial effect in the urine after half an hour. Taking 1 gram of this drug twice a day will keep your urine antibacterial for a longer period of time.

How Hiprex works in the body

Methenamine is a drug that works by turning into formaldehyde when in an acidic environment. Formaldehyde is a highly effective bacteria-killer, as it damages proteins and genetic material. Some bacteria can create an alkaline environment, which stops the formaldehyde from working. The salt component of the drug helps keep the environment acidic, so the formaldehyde can do its job.

When to interrupt dosage

The proposed dosage of Hiprex is contingent upon the determined condition. The amount of dosage is contingent upon the technique of administration, featured in the table below.

Condition

Dosage

Administration

prophylaxis of urinary tract infections

1000.0 mg, , 500.0 mg, 81.0 mg, 81.6 mg, 120.0 mg, 162.0 mg, 118.0 mg, 250.0 mg, 1.2 mg/mg, 40.8 mg, 0.0125 mg/mg, 0.25 mg/mg, 0.015 mg/mg, 0.3875 mg/mg, 1.5 mg/mL, 13.5 mg/mL, 2.7 mg/mL, 0.0027 mg/mg, 10.92 mg/mL, 10.4 mg/mL, 712.8 mg/mL, 13.0 mg/mL

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule - Oral, Capsule, Tablet, coated - Oral, Tablet, sugar coated - Oral, Tablet, coated, Tablet, sugar coated, Liquid - Extracorporeal, Extracorporeal, Liquid, Topical, Liquid - Topical, Granule, effervescent, Granule, effervescent - Oral

Urinary Tract Infections

1000.0 mg, , 500.0 mg, 81.0 mg, 81.6 mg, 120.0 mg, 162.0 mg, 118.0 mg, 250.0 mg, 1.2 mg/mg, 40.8 mg, 0.0125 mg/mg, 0.25 mg/mg, 0.015 mg/mg, 0.3875 mg/mg, 1.5 mg/mL, 13.5 mg/mL, 2.7 mg/mL, 0.0027 mg/mg, 10.92 mg/mL, 10.4 mg/mL, 712.8 mg/mL, 13.0 mg/mL

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule - Oral, Capsule, Tablet, coated - Oral, Tablet, sugar coated - Oral, Tablet, coated, Tablet, sugar coated, Liquid - Extracorporeal, Extracorporeal, Liquid, Topical, Liquid - Topical, Granule, effervescent, Granule, effervescent - Oral

Warnings

Hiprex possesses four contraindications, and it should not be combined with the conditions displayed in the following table.

Hiprex Contraindications

Condition

Risk Level

Notes

Liver Failure

Do Not Combine

Dehydration

Do Not Combine

Renal Insufficiency

Do Not Combine

Pulse Frequency

Do Not Combine

There are 20 known major drug interactions with Hiprex.

Common Hiprex Drug Interactions

Drug Name

Risk Level

Description

2,5-Dimethoxy-4-ethylamphetamine

Major

The serum concentration of 2,5-Dimethoxy-4-ethylamphetamine can be decreased when it is combined with Methenamine.

2,5-Dimethoxy-4-ethylthioamphetamine

Major

The serum concentration of 2,5-Dimethoxy-4-ethylthioamphetamine can be decreased when it is combined with Methenamine.

4-Bromo-2,5-dimethoxyamphetamine

Major

The serum concentration of 4-Bromo-2,5-dimethoxyamphetamine can be decreased when it is combined with Methenamine.

Acetyl sulfisoxazole

Major

Methenamine can cause a decrease in the absorption of Acetyl sulfisoxazole resulting in a reduced serum concentration and potentially a decrease in efficacy.

Amphetamine/Dextroamphetamine

Major

The serum concentration of Amphetamine can be decreased when it is combined with Methenamine.

Hiprex Toxicity & Overdose Risk

Fewer than 3.5% of individuals treated with this drug may have minor side effects, such as an upset stomach, difficulty urinating, nausea, or a rash.

image of a doctor in a lab doing drug, clinical research

Hiprex Novel Uses: Which Conditions Have a Clinical Trial Featuring Hiprex?

At present, 10 clinical trials are underway to determine the potential of Hiprex as a treatment for Urinary Tract Infections.

Condition

Clinical Trials

Trial Phases

prophylaxis of urinary tract infections

0 Actively Recruiting

Urinary Tract Infections

7 Actively Recruiting

Not Applicable, Phase 4

Hiprex Reviews: What are patients saying about Hiprex?

5

Patient Review

11/24/2014

Hiprex for Urinary Tract Infection

I've had E Coli infections for years, but since I started taking Hiprex 4 months ago, I've only had one infection. It's been excellent so far and I'm grateful for this medication.

5

Patient Review

12/9/2014

Hiprex for Urinary Tract Infection Prevention

I've had chronic e coli infections that resulted in me needing regular stenting surgeries. Even after ureteral reimplanation surgery, I was still getting infected due to reflux. However, since starting this medication six months ago, I haven't had a single infection and I couldn't be more grateful.

5

Patient Review

10/21/2014

Hiprex for Urinary Tract Infection Prevention

I've been taking Hiprex for four months now to combat my recurring E. coli infections, and it's only happened once since then! I take it alongside vitamin C to help with bladder acidity, and would recommend doing the same if you decide to go this route.

5

Patient Review

3/11/2022

Hiprex for Urinary Tract Infection Prevention

Hipprex is effective, but you must take Vitamin C with it. However, after being on it for years, I now have Neuropathy (numb feet and ankles). I did some research and found a link between the two, so I think care should be taken not to use this medication over long periods of time.

5

Patient Review

8/2/2022

Hiprex for Urinary Tract Infection Prevention

Hiprex has been a game-changer for me, and I haven't had to take antibiotics in over eight weeks. The only downside is that I've been experiencing fatigue and severe leg cramps. If anyone else has taken this medication, have you experienced similar side effects?

5

Patient Review

5/27/2016

Hiprex for Urinary Tract Infection

This stuff really works! I took it as directed and saw a huge difference. This is the only thing that has ever helped me, and I hate taking antibiotics. So glad to have found this product.

5

Patient Review

12/22/2020

Hiprex for Urinary Tract Infection

Hiprex is a real life saver. I take it as soon as I feel a UTI coming on and it always nips it in the bud.

5

Patient Review

2/8/2016

Hiprex for Urinary Tract Infection

Hiprex was the only drug that worked for me in the long term. However, if you have had recurring UTIs, it may be indicative of poor gut health. In this case, you might need to give up carbohydrates, sugar, and yeast altogether. I have not had a UTI since making these changes; however, I did experience a couple after ceasing Hiprex treatment even though it was effective while I was taking it. The benefits to my health and wellbeing are worth the challenge of giving up carbs.

5

Patient Review

9/8/2013

Hiprex for Urinary Tract Infection Prevention

5

Patient Review

1/31/2014

Hiprex for Urinary Tract Infection Prevention

5

Patient Review

10/18/2014

Hiprex for Urinary Tract Infection Prevention

I started having difficulty urinating and feeling discomfort after using Hiprex, which is concerning because there was no warning on the bottle about these potential side effects. I've been tested for a UTI but don't have one, so now I'm just waiting to see a specialist.

4

Patient Review

4/8/2018

Hiprex for Urinary Tract Infection

This treatment is gentle and effective. I'm from Australia and it's definitely better than cranberry capsules.

3.7

Patient Review

8/25/2017

Hiprex for Urinary Tract Infection Prevention

Unfortunately, this medication caused my urine to become so acidic that it literally burned all the hair off my genital area. In addition, my labia became incredibly dry and fragile to the point where even using toilet paper would cause tearing and bleeding. I stopped taking the medication and after using various creams things have healed up quite well. However, I now have urgency and frequency issues that I never had before taking this medication. I'm wondering if it will go back to normal after I've been off it for a while.

3

Patient Review

8/4/2014

Hiprex for Urinary Tract Infection

I am so glad to have found something that finally helps me with my chronic UTI problem.

3

Patient Review

1/21/2022

Hiprex for Urinary Tract Infection

I've only been taking Hiprex for a week, but the past few days I've had an awful taste in my mouth. Has anyone else experienced this?
image of drug pills surrounding a glass of water symbolizing drug consumption

Patient Q&A Section about hiprex

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Can Hiprex damage kidneys?

"This product may include inactive ingredients that can cause allergies or other issues. For more information, talk to your pharmacist. Tell your doctor or pharmacist about your medical history, especially if you have kidney or liver problems or dehydration, before taking this medication."

Answered by AI

Is Hiprex an antibiotic?

"Hiprex is an antibacterial agent that can kill both gram-positive and gram-negative bacteria. It starts working within 30 minutes of being taken."

Answered by AI

What is the drug Hiprex used for?

"Hiprex is used to prevent chronic urinary tract infections that recur. It is intended for people who need long-term prevention and is not used to treat active infections."

Answered by AI

What type of antibiotic is Hiprex?

"Hiprex is a drug used to treat and prevent urinary tract infections. It works by killing bacteria in the urinary tract."

Answered by AI

Clinical Trials for Hiprex

Image of Children's of Alabama in Birmingham, United States.

Antibiotic Duration for Infections in Children

60 - 17
All Sexes
Birmingham, AL

Infections like pneumonia, skin and soft tissue infection (also called SSTI or cellulitis), and urinary tract infections (UTI) are some of the most common reasons children get admitted to the hospital. All three of these conditions require antibiotics for treatment. Although antibiotics are needed to treat the infection and help children feel better, taking them longer than needed can negatively impact children and their families. Negative impacts include things like the burdens of taking more medications and medication side effects. There are guidelines (instructions) from expert medical organizations that suggest the number of days children need antibiotics, but they give a wide range (between 5 and 14 days). Unfortunately, these guidelines are not based on high-quality studies. National data suggests that doctors often choose on the higher end of this range when writing prescriptions for children in the hospital. Our three caregiver co-investigators, other parents of hospitalized children, doctors, other care providers, and researchers, all believe that additional study is needed to determine the best length of antibiotic treatment that weighs both the benefits and harms of antibiotics. The goal of our study is to understand if 5 total days of antibiotic treatment compared to 10 total days of antibiotic treatment is better for children who have been in the hospital for pneumonia, SSTI, or UTI. We will study this question through a randomized control trial. In other words, half of the children will receive 5-days of antibiotics and the other half will receive 10-days of antibiotics. Children in this study (and their caregivers) will not know how many days of antibiotics they will receive to cure their infection because some children will take a placebo (or a pill without antibiotics in it). Only the pharmacy will know if a child is getting antibiotic or placebo (for days 6-10 of treatment). During the first phase of the trial (feasibility phase), 4 hospitals will enroll children in the study. We plan on enrolling 50 patients during this phase. We are starting with just 4 hospitals, so our study team can create and update our study plans if needed. We will closely review information about how many patients and families agree to participate, and if they have any trouble completing any part of the study. We will also interview families to understand the choice to participate in the study, the choice not to participate in the study, and what it is like to be in the study. During the second study phase, we will enroll 1150 more patients across all 11 hospitals. Families will complete short, daily surveys until the 15th day after they started antibiotics, then a larger survey at day 15, at day 20, and at day 30. These surveys will ask about the child's symptoms and recovery from their illness, how the antibiotics are making them feel, and if they had to go back to their doctor, emergency room, or hospital. The answers to these questions will be combined to measure how well the child did, balancing feeling better and having bad effects from the antibiotics. We will use mathematical tests to determine which antibiotic duration is better for treating these illnesses. We will complete other mathematical tests to see if all children should receive the same length of antibiotics or if certain children should be prescribed shorter courses and others longer courses.

Phase 4
Waitlist Available

Children's of Alabama (+9 Sites)

Sunitha V Kaiser, MD, MSc

Image of Medstar National Rehabilitation Hospital in Washington D.C., United States.

Lactobacillus Crispatus for Urinary Tract Infection

18+
All Sexes
Washington D.C., United States

The goal of this clinical trial is to determine whether Lactobacillus crispatus strains isolated from the lower urinary tracts of adult women can be used as an antibiotic-sparing treatment for urinary symptoms and urinary tract infection (UTI) among adults with neurogenic lower urinary tract dysfunction (NLUTD). The main question\[s\] it aims to answer are: 1. To identify soluble bactericidal compounds produced by urinary isolates of L. crispatus that kill uropathogenic E. coli (UPEC). 2. To determine if intravesical instillation of L. crispatus is safe and well tolerated in adults with NLUTD due to SCI who use intermittent catheterization (IC). If there is a comparison group: Researchers will compare L. Crispatus to standard care saline to see if there is a difference in urinary symptoms and urinary microbiome. Participants will be asked to complete daily symptom surveys, complete 2 bladder instillations, and collect, freeze, and return 14 urine samples.

Phase < 1
Recruiting

Medstar National Rehabilitation Hospital

Suzanne Groah, MD

Image of Baylor College of Medicine in Houston, United States.

Educational Tool for Urinary Tract Infections

18+
All Sexes
Houston, TX

Urine culture is the most common microbiological test in the outpatient setting in the United States. Unfortunately, contamination during collection is prevalent and undermines test accuracy, leading to incorrect diagnosis, unnecessary treatment, wasted laboratory resources, and inflated costs. Unnecessary antibiotic treatment increases the risk of developing antimicrobial resistance, one of the most serious threats to patients and public health. The goal of this clinical trial is to test whether a bilingual (English and Spanish) educational intervention, an animated video and pictorial flyer, can reduce urine culture contamination and associated inappropriate antibiotic use in adult patients visiting safety-net primary care clinics. The main questions it aims to answer are: 1. Does providing patients with a bilingual educational intervention reduce urine culture contamination rates? 2. Does the intervention lead to fewer unnecessary urinary antibiotic prescriptions? 3. Does providing patients with a bilingual educational intervention reduce contaminated urinalyses? Researchers will compare patients randomized to receive the educational intervention (video and flyer) to those receiving usual care to see if the intervention improves urine collection accuracy and reduces inappropriate antibiotic use. Participants will watch a short, animated video with step-by-step instructions for proper midstream clean-catch urine (MSCC) collection, receive a pictorial flyer (with stills from the video) reinforcing the instructions, and provide a urine sample for culture. Hypothesis: patients who receive the educational intervention will have: lower urine culture contamination rates (primary outcome), fewer urinary antibiotic prescriptions (secondary outcome), and fewer contaminated urinalyses (secondary outcome). The objectives are to (1) develop educational tools: Create an animated video and pictorial flyer with step-by-step urine collection instructions for women and men, developed through an iterative, stakeholder-engaged process, (2) assess acceptability: Use mixed methods (quantitative surveys and qualitative interviews) to evaluate and refine the tools for usability and cultural/linguistic appropriateness, and (3) test effectiveness: Conduct a randomized controlled trial to assess the intervention's impact on urine contamination rates, antibiotic prescribing, and patient satisfaction.

Waitlist Available
Has No Placebo

Baylor College of Medicine

Larissa Grigoryan, MD, PhD

Image of UPMC Magee-Womens Hospital in Pittsburgh, United States.

Catheterization Methods for Postpartum Urinary Problems

18+
All Sexes
Pittsburgh, PA

At least ten percent of patients have postpartum urinary retention or difficulty urinating after birth, which can cause incontinence and other urinary problems long-term. After getting an epidural placed, patients should be numb in their pelvic region. This numbness makes it difficult to feel the need to urinate, so patients need a urinary catheter placed to empty the bladder. Some patients have one catheter placed throughout their labor and others have a catheter placed to empty the bladder then removed every few hours. The investigators are studying whether placing a catheter once or catheterizing multiple times affects the rate of postpartum urinary problems and infection.

Waitlist Available
Has No Placebo

UPMC Magee-Womens Hospital

Anna Binstock, MD

Have you considered Hiprex clinical trials?

We made a collection of clinical trials featuring Hiprex, we think they might fit your search criteria.
Go to Trials
Image of Atlantic Health in Morristown, United States.

Methenamine for Urinary Tract Infection

18 - 100
Female
Morristown, NJ

Stress urinary incontinence (SUI) affects at least 40% of women in the United States. Synthetic polypropylene mid-urethral slings (MUS) are the gold standard treatment for SUI. Post-operative urinary tract infections (UTI) are one of the most common complications after MUS placement. Some studies have demonstrated that MUS placement can increase the risk of UTI up to 21-34%. Post-operative UTI can lead to significant healthcare and patient burden. This additional burden further contributes to an estimated annual cost of $1.6 billion for UTI management in the United States. With increased antibiotic usage, there is simultaneous increase in bacterial resistance leading to treatment refractory UTI. The investigators prescribe post-operative antibiotics prophylactically for 3 days after MUS placement with or without concurrent pelvic reconstructive surgery based on prior literature recommending post-operative prophylaxis. There is a greater emphasis on limiting antibiotic use given the trend of development of bacterial resistance. There are studies supporting alternatives such as methenamine for recurrent UTI prophylaxis treatment, but there are limited studies evaluating methenamine for UTI prophylaxis after MUS.

Recruiting
Has No Placebo

Atlantic Health

Image of Vriginia Mason Medical Center in Seattle, United States.

Antibiotic Usage for Overactive Bladder

18+
All Sexes
Seattle, WA

Intradetrusor injection of onabotulinumtoxinA, which is performed through a cystoscopic procedure, has been demonstrated to be efficacious in the treatment of both neurogenic and non-neurogenic overactive bladder (OAB), and is FDA approved as a treatment for overactive bladder. Intradetrusor of onabotulinumtoxinA is currently standard of care of patients with OAB who have persistent OAB symptoms despite behavioral therapies and oral medication treatments for OAB. As one of the main adverse events associated with intradetrusor injection of onabotulinumtoxinA is UTI, and published guidelines for cystoscopic procedures with manipulation recommend the use of prophylactic antibiotics, a single dose of prophylactic antibiotic is administered prior to this procedure. However, these recommendations are primarily based on data from randomized controlled trials (RCTs) involving antimicrobial prophylaxis during transurethral resection of the prostate. A previously published prospective study demonstrated that the rate of post-procedural UTI did not differ amongst patients with neurogenic bladder who did not receive prophylactic antibiotics and were asymptomatic for UTI, regardless of whether they had sterile urine cultures or asymptomatic bacteriuria, suggesting that patients who are not symptomatic for UTI may not require antibiotic prophylaxis prior to intradetrusor onabotulinumtoxinA injection. Studies have reported that up to 50% of antibiotic usage is inappropriate, leading to unnecessary exposure of patients to potential complications of antibiotic therapy, including Clostridium difficile infection which can cause recurrent diarrhea that may progress to sepsis and death, increasing antibiotic resistances, as well as dermal/allergic and gastro-intestinal manifestations. Therefore, in an effort to optimize antibiotic use, the investigators propose a prospective, randomized study to formally evaluate the differences in UTI frequency in subjects who have a negative urinalysis and are not symptomatic for UTI and receive prophylactic antibiotics at the time of intradetrusor onabotulinumtoxinA injection compared to those who do not receive prophylactic antibiotics at the time of injection. The proposed study seeks to evaluate the current practice standard of antibiotic prophylaxis prior to intradetrusor onabotulinumtoxin injection.

Recruiting
Has No Placebo

Vriginia Mason Medical Center (+1 Sites)

Justina Tam, MD