Exciting news! 🎉 Qwark’s AI pharmacy assistant (in beta) is now live and ready to answer any medication-related questions you may have!Try it out now!
  1. Drugs
  2. Methenamine
Methenamine Image


Free shipping
No membership fee
Qwark price promise
Qwark is committed to lowering your prescription prices. We will always recommend the best price we can find. If you find a lower price on an identical, in-stock product, tell us and we'll match it.

For more strengths and prices, please contact Qwark support

Need help?

Our patient support team is available Monday through Friday 8AM - 6PM PST, and Saturday 9AM - 12PM PST.

What Is Methenamine?

Methenamine is a prescription drug that is commonly used to prevent or suppress urinary tract and bladder infections that have not responded well to antibiotics alone. It is classified as an antibacterial agent and works by creating an acidic environment in the urine, which helps inhibit the growth of bacteria. When methenamine is ingested, it is converted into formaldehyde in the acidic urine. Formaldehyde is a potent antimicrobial agent that helps kill the bacteria responsible for the infections. This medication is typically taken orally and is available in tablet or granule form. It is important to note that methenamine should not be used to treat active infections, as it is not effective in killing bacteria when urine is not acidic. It is mainly used as a preventive measure to reduce the recurrence of urinary tract and bladder infections. Additionally, it may take several weeks of treatment before its full effectiveness is seen. As with any medication, methenamine can have side effects. Common side effects include gastrointestinal discomfort, such as stomach upset or nausea. It is important to follow the instructions provided by the healthcare provider and report any unusual or severe side effects. It is crucial to consult with a healthcare professional before starting or adjusting any medication regimen, including methenamine, to ensure it is appropriate for your specific health condition and to avoid any potential drug interactions or complications.

How to use Methenamine?

To use methenamine effectively, it's important to understand the instructions provided by your healthcare provider. Here are some general guidelines: 1. Take the medication exactly as prescribed by your doctor. Do not take more or less of the drug or use it for a longer duration than recommended. 2. Methenamine is typically taken by mouth with a full glass of water. It's important to stay well-hydrated while taking this medication. 3. Take methenamine on an empty stomach, at least one hour before or two hours after meals, to ensure proper absorption. 4. Your healthcare provider may prescribe methenamine for a specific duration or it may be taken continuously to prevent recurring urinary tract and bladder infections. Follow the recommended treatment plan. 5. Do not chew, crush, or dissolve the methenamine tablets. Swallow them whole. 6. Avoid taking antacids containing aluminum, magnesium, or calcium while using methenamine, as they can interfere with the effectiveness of the medication. If you need to take an antacid, consult your doctor or pharmacist for guidance. 7. It's important to complete the full course of treatment, even if you start feeling better. Stopping methenamine prematurely may increase the risk of infection recurrence. 8. Contact your doctor if your symptoms worsen or if you experience any new or persistent side effects while using methenamine. Remember, these instructions are a general guideline. Always consult your healthcare provider for personalized advice and dosing instructions based on your specific medical condition.

There are several warnings associated with the use of Methenamine. 1. Allergies: If you have a known allergy to Methenamine or any of its components, it's important to inform your healthcare provider before starting the medication. Allergic reactions can range from mild skin rashes to severe respiratory problems, and immediate medical attention should be sought if any signs of an allergic reaction occur. 2. Urinary Obstruction: Methenamine should be used with caution in patients with urinary tract obstruction, such as bladder outlet obstruction or enlarged prostate gland. This drug works by acidifying the urine, which can cause stone formation or worsen existing urinary tract obstruction. 3. Liver and Kidney Function: Methenamine is metabolized by the liver, and its by-products are excreted through the kidneys. Therefore, individuals with impaired liver or kidney function should use Methenamine with caution, as it may accumulate in the body and lead to adverse effects. 4. Drug Interactions: Methenamine may interact with certain medications, including those that increase urine pH, such as sodium bicarbonate and acetazolamide. It's important to inform your healthcare provider about all the medications, vitamins, and supplements you are currently taking to prevent any potential drug interactions. 5. Pregnancy and Breastfeeding: The safety of Methenamine during pregnancy and breastfeeding has not been established. It is recommended to discuss the potential risks and benefits with your healthcare provider before using this medication if you are pregnant or breastfeeding. These are some of the important warnings associated with the use of Methenamine. It's important to always follow the instructions and guidance of your healthcare provider when using this medication.

Before taking methenamine, it is important to be aware of certain precautions and warnings. Here are some key points to consider: 1. Allergies: Inform your healthcare provider if you have any known allergies or sensitivities to methenamine or any other medications. It's crucial to avoid this drug if you have a known hypersensitivity to it. 2. Urinary obstruction: Methenamine may not be suitable for individuals with urinary tract or bladder obstructions. If you have any history or existing conditions related to urinary obstruction, inform your doctor before starting this medication. 3. Liver or kidney problems: People with severe liver or kidney impairment may require dose adjustments or special monitoring while taking methenamine. Make sure to discuss your medical history with your healthcare provider. 4. Pregnancy and breastfeeding: If you are pregnant, planning to become pregnant, or breastfeeding, it is essential to consult with your doctor before using methenamine. The potential risks and benefits must be evaluated in these situations. 5. Drug interactions: Methenamine has the potential to interact with certain medications, including those that affect urine acidity. Inform your healthcare provider about any other medications, supplements, or herbal products you are currently taking. 6. Pediatric use: Methenamine should be used with caution in children, as the dosage and safety considerations might be different from those in adults. Consult with a pediatrician to determine the appropriate use of this medication in children. Remember, it is crucial to follow your healthcare provider's advice and instructions regarding the use of methenamine. If you have any concerns or questions, don't hesitate to reach out to your doctor or pharmacist for clarification.

Methenamine is a prescription medication commonly used to prevent or suppress recurrent urinary tract and bladder infections that have not responded well to antibiotics. While it is generally well-tolerated, like any medication, it can potentially cause side effects. Here are some possible side effects associated with the use of Methenamine: 1. Gastrointestinal Issues: Some individuals may experience gastrointestinal discomfort such as nausea, vomiting, stomach pain, or diarrhea. Taking the medication with food can help alleviate these symptoms. 2. Urinary Symptoms: Methenamine can occasionally cause urinary side effects, including painful or difficult urination, blood in the urine, or urgency to urinate. 3. Allergic Reactions: Although rare, allergic reactions to Methenamine can occur. Signs of an allergic reaction may include rash, itching, swelling, severe dizziness, or difficulty breathing. Seek immediate medical attention if you experience any of these symptoms. 4. Diagnosing Difficulties: Methenamine can interfere with laboratory tests used to diagnose certain conditions, such as urine tests for glucose or blood tests for liver function. Inform your healthcare provider that you are taking Methenamine to ensure accurate test results. While these are the commonly reported side effects, it is important to remember that everyone responds differently to medication. If you experience any unusual or severe symptoms while taking Methenamine, it is crucial to consult your doctor for further guidance.

Methenamine, available under brand names such as Hiprex and Urex, is a medication used to prevent or suppress recurring urinary tract and bladder infections. It belongs to the class of drugs known as urinary antiseptics. The active ingredient in methenamine is, unsurprisingly, methenamine itself. However, it is important to note that methenamine is not the sole ingredient in the drug product. Methenamine is a solid substance that is combined with other ingredients to create a tablet or granule form that can be easily ingested. In addition to methenamine, the drug formulation typically includes other inactive ingredients or excipients. These excipients help to stabilize the medication and may include substances such as microcrystalline cellulose, crospovidone, colloidal silicon dioxide, magnesium stearate, and others depending on the specific brand. It's worth mentioning that if you have any known allergies or sensitivities to certain substances, it is essential to consult with your healthcare provider or pharmacist to ensure that methenamine, along with its accompanying inactive ingredients, is safe for you to use.

Methenamine, also known as hexamine or urotropine, is a prescription medication used to prevent or suppress recurring urinary tract and bladder infections that have not responded well to antibiotics. Proper storage of methenamine is important to maintain its effectiveness and safety. Here are some guidelines for handling storage of methenamine: 1. Temperature: Store methenamine at room temperature, ideally between 68°F and 77°F (20°C and 25°C). Avoid exposure to extreme heat or cold, as it can affect the stability of the medication. 2. Moisture: Keep methenamine away from moisture and humidity. Store it in a dry place, and ensure that the container is tightly closed to prevent moisture from getting in. 3. Light: Protect methenamine from direct sunlight and excessive light exposure. It is recommended to store it in a dark place, such as a closed cupboard or medicine cabinet. 4. Accessibility: Store methenamine out of reach and sight of children and pets. Consider using childproof containers or storing it in a locked cabinet to prevent accidental ingestion. 5. Packaging: Keep methenamine in its original packaging or prescription bottle. This helps in proper identification and protects the medication from contamination. 6. Expiry Date: Check the expiration date on the packaging or prescription bottle. Dispose of any methenamine that has expired or is no longer needed, following proper disposal guidelines. Always consult with your healthcare provider or pharmacist if you have any specific questions or concerns regarding the storage and handling of methenamine. They can provide personalized guidance based on your individual circumstances.