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Methenamine and Sodium Acid Phosphate

Generic Name: Methenamine and Sodium Acid Phosphate (meth EN a meen & SOW dee um AS id FOS fate)
Brand Name: Uroqid-Acid No. 2

Uses of Methenamine and Sodium Acid Phosphate:

  • It is used to treat or prevent a bladder infection.

What do I need to tell my doctor BEFORE I take Methenamine and Sodium Acid Phosphate?

  • If you have an allergy to methenamine and sodium acid phosphate or any other part of methenamine and sodium acid phosphate.
  • If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
  • If you have any of these health problems: High phosphate levels in your blood, kidney disease, or if you have a lot of fluid loss (dehydrated).
  • If you are taking sulfamethizole.
  • If you are taking a sulfa (sulfonamide) drug. Ask your doctor if you are not sure if any of your drugs are a sulfa drug.

This is not a list of all drugs or health problems that interact with this medicine.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take methenamine and sodium acid phosphate with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Methenamine and Sodium Acid Phosphate?

  • Tell all of your health care providers that you take this medicine. This includes your doctors, nurses, pharmacists, and dentists.
  • Talk with your doctor before you take aspirin, antacids, or drugs that raise the pH of the urine while on methenamine and sodium acid phosphate.
  • You may need to check the acid content (pH) of your urine using a dipstick test.
  • Talk with your doctor before you eat citrus fruits, dairy products, and some veggies while taking this medicine.
  • If you are on a low-salt or salt-free diet, talk with your doctor.
  • This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take methenamine and sodium acid phosphate.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this medicine while you are pregnant.
  • Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is this medicine (Methenamine and Sodium Acid Phosphate) best taken?

Use methenamine and sodium acid phosphate as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • To gain the most benefit, do not miss doses.
  • Keep using this medicine as you have been told by your doctor or other health care provider, even if you feel well.
  • Take with or without food. Take with food if it causes an upset stomach.
  • Drink lots of noncaffeine liquids unless told to drink less liquid by your doctor.

What do I do if I miss a dose?

  • Take a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Very upset stomach or throwing up.
  • Belly pain.
  • Bone or joint pain.
  • Blood in the urine.
  • Bladder pain or pain when passing urine or change in how much urine is passed.
  • Mood changes.
  • Feeling confused.
  • Muscle cramps.
  • Numbness or tingling around the mouth.
  • Numbness or tingling in the hands or feet.
  • Seizures.
  • More thirst.
  • Feeling very tired or weak.
  • A big weight gain.

What are some other side effects of Methenamine and Sodium Acid Phosphate?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Upset stomach.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

See also: Side effects (in more detail)

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Methenamine and Sodium Acid Phosphate?

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.
  • Protect from light.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.

Consumer Information Use and Disclaimer

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else's drugs.
  • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
  • Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
  • Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about methenamine and sodium acid phosphate, please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about methenamine and sodium acid phosphate. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using methenamine and sodium acid phosphate.

Review Date: September 6, 2017

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