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Urex Patient Information including How Should I Take
In this Article
- What is methenamine (Urex)?
- What are the possible side effects of methenamine (Urex)?
- What is the most important information I should know about methenamine (Urex)?
- What should I discuss with my healthcare provider before taking methenamine (Urex)?
- How should I take methenamine (Urex)?
- What happens if I miss a dose (Urex)?
- What happens if I overdose (Urex)?
- What should I avoid while taking methenamine (Urex)?
- What other drugs will affect methenamine (Urex)?
- Where can I get more information?
What should I discuss with my healthcare provider before taking methenamine (Urex)?
Before taking methenamine, talk to your doctor if you
- have liver problems;
- have kidney problems;
- have other medical conditions; or
- take other medications.
You may not be able to take methenamine, or you may require a dosage adjustment or special monitoring during treatment.
Methenamine is in the FDA pregnancy category C. This means that it is not known whether it will be harmful to an unborn baby. Do not take methenamine without first talking to your doctor if you are pregnant or could become pregnant during treatment.
Methenamine passes into breast milk and may affect a nursing baby. Do not take methenamine without first talking to your doctor if you are breast-feeding a baby.
How should I take methenamine (Urex)?
Take methenamine exactly as directed by your doctor. If you do not understand these instructions, ask your doctor, nurse, or pharmacist to explain them to you.
Take each dose with a full glass of water. Plenty of fluid should be consumed while taking methenamine.
Methenamine should be taken with food to reduce stomach upset.
Do not crush or chew the enteric-coated tablets. Swallow them whole. They are specially formulated to be less irritating to the stomach. Talk to your doctor if swallowing the tablets is difficult.
Shake the liquid form of methenamine well before measuring a dose. To ensure that you get the correct dose, measure the suspension with a dose-measuring spoon, dropper, or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist where you can get one.
It is important to take methenamine at regularly scheduled intervals to get the most benefit.
Take all of the methenamine that has been prescribed for you even if you begin to feel better. Symptoms may start to improve before the infection is completely treated.
Your healthcare provider may recommend drinking additional water and/or certain fruit juices (e.g., cranberry, plum, prune) and increased protein in the diet while taking methenamine to ensure adequate hydration and acidity of the urine. It may also be recommended to avoid citrus fruits and juices (e.g., orange, grapefruit, lemon), milk and dairy products, and antacids during treatment with methenamine. These products may decrease the effectiveness of methenamine. Follow your healthcare provider's instructions.
Store methenamine at room temperature away from moisture and heat.
Additional Urex Information
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Report Problems to the Food and Drug Administration
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