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Methylene Blue (Systemic)
In the U.S.-
Other commonly used names are aniline violet; methylthionine chloride; tetramethylthionine chloride.
Methylene ( METH-i-leen) blue is used to treat a condition called methemoglobinemia. This condition occurs when the blood cannot deliver oxygen where it is needed in the body. Methylene blue is also used as a dye to stain certain parts of the body before or during surgery.
Before Using This Medicine
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For methylene blue, the following should be considered:
Allergies- Tell your doctor if you have ever had any unusual or allergic reaction to methylene blue. Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes.
Pregnancy- Studies on effects in pregnancy have not been done in either humans or animals.
Breast-feeding- It is not known whether methylene blue passes into breast milk. Although most medicines pass into breast milk in small amounts, many of them may be used safely while breast-feeding. Mothers who are taking this medicine and who wish to breast-feed should discuss this with their doctor.
Children- Babies are especially sensitive to the effects of methylene blue. This may increase the chance of side effects during treatment.
Older adults- Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults. Although there is no specific information comparing the use of methylene blue in the elderly with use in other age groups, this medicine is not expected to cause different side effects or problems in older people than it does in younger adults.
Other medicines- Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your health care professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
Other medical problems- The presence of other medical problems may affect the use of methylene blue. Make sure you tell your doctor if you have any other medical problems, especially:
Proper Use of This Medicine
For patients taking the tablet form of this medicine:
Take this medicine only as directed . Do not take more of it and do not take it more often than recommended on the label unless directed by your doctor. To do so may increase the chance of side effects.
The dose of methylene blue will be different for different patients. Follow your doctor's orders or the directions on the label . The following information includes only the average doses of methylene blue. If your dose is different, do not change it unless your doctor tells you to do so.
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
To store this medicine:
Precautions While Using This Medicine
Before you have any medical tests, tell the doctor in charge that you are taking this medicine. The results of some tests may be affected by this medicine.
Side Effects of This Medicine
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:
Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT