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Drugs A–Z

Methenamine, Sodium Phosphate, Monobasic, Anhydrous, Phenyl Salicylate, Methylene Blue and Hyoscyamine Sulfate

Methenamine, Sodium Phosphate, Monobasic, Anhydrous, Phenyl Salicylate, Methylene Blue and Hyoscyamine Sulfate is a prescription medicine. The sections below reproduce one FDA label for it, named under "Label". Products in other forms, strengths or from other makers have their own labels, which can differ.

Type
Prescription only (Rx)
Brand names
Uro-MP
Taken
Oral
Label
Method Pharmaceuticals, LLC, revised October 29, 2025 · full label on DailyMed
Generic
No · details

What it is used for

Uro-MP Capsules are indicated for the treatment of symptoms of irritative voiding. Indicated for the relief of local symptoms, such as inflammation, hypermotility, and pain, which accompany lower urinary tract infections. Indicated for the relief of urinary tract symptoms caused by diagnostic procedures.

Who should not take it (contraindications)

Uro-MP Capsules are contraindicated in patients with a hypersensitivity to any of the ingredients. Risk-benefit should be considered when the following medical problems exist: Cardiac disease (especially cardiac arrhythmias, congestive heart failure, coronary heart disease, and mitral stenosis); gastrointestinal tract obstructive disease; glaucoma; myasthenia gravis; acute urinary retention may be precipitated in obstructive uropathy (such as bladder neck obstruction due to prostatic hypertrophy).

Warnings

Do not exceed recommended dosage. If rapid pulse, dizziness, or blurring of vision occurs, discontinue use immediately. KEEP THIS AND ALL MEDICATIONS OUT OF THE REACH OF CHILDREN. IN CASE OF ACCIDENTAL OVERDOSE, SEEK PROFESSIONAL ASSISTANCE OR CONTACT A POISON CONTROL CENTER IMMEDIATELY.

WARNING: Keep this and all drugs out of reach of children. Rx Only Manufactured for: Method Pharmaceuticals, LLC Southlake, TX 76092 www.methodpharm.com Rev. 02/23

Precautions

Cross sensitivity and/or related problems: Patients intolerant of other belladonna alkaloids or other salicylates may be intolerant of this medication also. Delay in gastric emptying could complicate the management of gastric ulcers. Pregnancy/Reproduction (FDA Pregnancy Category C): Hyoscyamine and methenamine cross the placenta. Studies have not been done in either animals or humans. It is not known whether Uro-MP Capsules can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Uro-MP Capsules should be given to a pregnant woman only if clearly needed. Nursing mothers: Methenamine and traces of hyoscyamine are excreted in breast milk. Caution should be exercised when Uro-MP Capsules are administered to a nursing mother. Prolonged use: There have been no studies to establish the safety of prolonged use in humans. No known long-term animal studies have been performed to evaluate carcinogenic potential. Pediatric: Infants and young children are especially susceptible to the toxic effect of the belladonna alkaloids. Geriatric: Use with caution in elderly patients as they may respond to the usual doses of the belladonna alkaloids with excitement, agitation, drowsiness, or confusion.

Side effects (adverse reactions)

Cardiovascular – rapid pulse, flushing Central Nervous System – blurred vision, dizziness, drowsiness Respiratory – shortness of breath or troubled breathing Genitourinary – difficult micturition, acute urinary retention Gastrointestinal -dry mouth, nausea and vomiting Serious allergic reactions to this drug are rare. Seek immediate medical attention if you notice symptoms of a serious allergic reaction, including itching, rash, severe dizziness, swelling or trouble breathing. This medication can cause urine and sometimes stools to turn blue to blue-green. This effect is harmless and will subside after medication is stopped. Call your doctor or physician for medical advice about side effects. To report SUSPECTED ADVERSE REACTIONS, contact Method Pharmaceuticals, LLC at (877) 250-3427.

Drug interactions

As a result of hyoscyamine's effects on gastrointestinal motility and gastric emptying, absorption of other oral medications may be decreased during concurrent use with this combination medication. Urinary alkalizers and thiazide diuretics: May cause the urine to become alkaline reducing the effectiveness of methenamine by inhibiting its conversion to formaldehyde. Antimuscarinics: Concurrent use may intensify antimuscarinic effects of hyoscyamine because of secondary antimuscarinic activities of these medications. Antacids/antidiarrheals: Concurrent use may reduce absorption of hyoscyamine resulting in decreased therapeutic effectiveness. Concurrent use with antacids may cause urine to become alkaline reducing the effectiveness of methenamine by inhibiting its conversion to formaldehyde. Doses of these medications should be spaced 1 hour apart from doses of hyoscyamine. Antimyasthenics: Concurrent use with hyoscyamine may further reduce intestinal motility, therefore, caution is recommended. Ketoconazole and hyoscyamine may cause increased gastrointestinal pH. Concurrent administration with hyoscyamine may result in marked reduction in the absorption of ketoconazole. Patients should be advised to take this combination at least 2 hours after ketoconazole. Monoamine oxidase (MAO) inhibitors: Concurrent use with hyoscyamine may intensify antimuscarinic side effects. Opioid (narcotic) analgesics may result in increased risk of severe constipation. Sulfonamides: These drugs may precipitate with formaldehyde in the urine increasing the danger of crystalluria. Patients should be advised that the urine and/or stools may become blue to blue-green as a result of the excretion of methylene blue. Drug Abuse And Dependence A dependence on the use of Uro-MP Capsules has not been reported and due to the nature of its ingredients, abuse of Uro-MP Capsules is not expected.

Pregnancy

/Reproduction (FDA Pregnancy Category C): Hyoscyamine and methenamine cross the placenta. Studies have not been done in either animals or humans. It is not known whether Uro-MP Capsules can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Uro-MP Capsules should be given to a pregnant woman only if clearly needed.

Breastfeeding

Methenamine and traces of hyoscyamine are excreted in breast milk. Caution should be exercised when Uro-MP Capsules are administered to a nursing mother. Prolonged use: There have been no studies to establish the safety of prolonged use in humans. No known long-term animal studies have been performed to evaluate carcinogenic potential.

Use in children

Pediatric: Infants and young children are especially susceptible to the toxic effect of the belladonna alkaloids.

Use in older adults

Geriatric: Use with caution in elderly patients as they may respond to the usual doses of the belladonna alkaloids with excitement, agitation, drowsiness, or confusion.

Is there a generic Methenamine, Sodium Phosphate, Monobasic, Anhydrous, Phenyl Salicylate, Methylene Blue and Hyoscyamine Sulfate?

No. The FDA has not approved a generic version yet.

Source: Drugs@FDA (via openFDA), checked October 29, 2026. Marketing status is what companies report to the FDA; whether a pharmacy stocks a product, and what your insurance covers, can differ.

Dosage:
we do not reproduce dosing instructions. The right dose depends on the person and the condition and is set by the prescriber or pharmacist. Dosage section of the full label.

Methenamine, sodium phosphate, monobasic, anhydrous, phenyl salicylate, methylene blue and hyoscyamine sulfate in the news

We have not covered this medicine yet. Latest news

Recalls

No recalls matched to this medicine in FDA enforcement reports from the last 3 years (or older ones still open). Search all recalls

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Source: FDA structured product labeling, retrieved through openFDA. Label text is shown as published by the FDA, without editing; long sections are shortened, marked […]. openFDA data are not validated for clinical use — always check the current label and ask a doctor or pharmacist about your own treatment. Set ID 1e1b0dee-1a3b-4846-a212-c9febb3fc17d.


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Important: this content is for informational purposes only and is not medical advice, a prescribing instruction, or a recommendation to act. Consult a licensed healthcare professional before taking any medication.

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