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Elmiron

Pentosan polysulfate (sold under the name Elmiron) was the first --and only-- oral medication approved by the US FDA for the treatment of interstitial cystitis, also known as painful bladder syndrome. Interstitial cystitis patients struggle with symptoms of urinary frequency, urgency, pressure and/or pain, as well as nocturia (frequent urination at night), dyspareunia (painful intercourse), pain and/or discomfort while sitting in a car, while driving and/or travelling. more...

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The origin/cause of IC is unknown though a number of theories are currently under consideration. Urine cultures are typically negative for infection, yet it is not unusual for patients to believe that they have had infections for years rather than IC. Why? Because the symptoms of an infection are nearly identical to the symptoms of IC.

Diagnosis has been greatly simplied in recent years with the development of two new methodologies. The Pelvic Pain Urgency/Frequency (PUF) Patient Survey, created by C. Lowell Parsons, is a short questionnaire that will help doctors identify if pelvic pain could be coming from the bladder. The KCL Test, aka the Potassium Sensitivity Test, uses a mild potassium solution to test the integrity of the bladder wall. Though the latter is not specific for IC, it has been determined to be helpful in the evaluation of the use of compounds, such as pentosan, which are designed to help repair the GAG layer. The previous "gold standard" test for IC was the use of hydrodistention with cystoscopy. Researchers, however, determined that this visual examination of the bladder wall was also not specific for IC and that the test, itself, can contribute to the development of small glomerulations (aka petechial hemorrhages) often found in IC. Thus, a diagnosis of IC is one of exclusion, as well as a review of clinical symptoms.

Pentosan is believed to work by providing a protective coating to the damaged bladder wall. The critical flaw of the medication, however, is its exceptionally poor bioavailability when taken orally. Research presented late in 2005 by Alza Pharmaceuticals (Metabolism of pentosan polysulfate sodium (PPS) in healthy human volunteers. Xenobiotica. 2005 Aug;35(8):775-84.) demonstrates that more than 84% of the medication is excreted, intact, in feces without providing any beneficial effect. Their research found that only 6% was excreted through urine. Thus, it must be taken for several months for most patients to achieve some benefit. More recently, however, Elmiron has been studied as part of a "rescue instillation" which is placed directly in the bladder and can, perhaps, provide better effectiveness. C. Lowell Parsons has presented a research study which shows a 90% effectiveness in reducing the symptoms of IC patients by using this instillation.

Patients who have taken pentosan orally report a variety of side effects, primarily GI complaints such as diarrhea, heartburn, stomach pain. Hair loss, headache, rash, insomnia have also been reported. One concern is the potential for blood thinning with this medication. Some patients have reported that they bruise more easily. In some cases, patients are asked to stop medication before any major surgical procedures to reduce the likelihood of bleeding.

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Clinical Quiz
From American Family Physician, 10/1/01

Clinical Quiz questions are based on selected articles in this issue. Answers appear in this issue.

American Family Physician has been approved by the American Academy of Family Physicians as having educational content acceptable for Prescribed credit hours. Term of approval covers issues published within one year from the beginning distribution date of October 2001. This issue has been approved for up to 3 Prescribed credit hours. Credit may be claimed for one year from the date of this issue.

The American Academy of Family Physicians is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.

The AAFP designates this educational activity for a maximum of 3 hours in Category 1 credit toward the American Medical Association Physician's Recognition Award. Each physician should claim only those hours of credit that he or she actually spent in the educational activity.

AAFP Credit

Each copy of AFP contains a Clinical Quiz answer card. AAFP members may use this card to obtain the designated number of Prescribed credit hours for the year in which the card is postmarked.

AMA/PRA Category 1 Credit

AAFP members who satisfy the Academy's continuing medical education requirements are automatically eligible for the AMA/PRA.

Physicians who are not members of the AAFP are eligible to receive the designated number of credit hours in Category 1 of the AMA/PRA on completion and return of the Clinical Quiz answer card. AFP keeps a record of AMA/PRA Category 1 credit hours for nonmember physicians. This record will be provided on request; however, nonmembers are responsible for reporting their own Category 1 CME credits when applying for the AMA/PRA or other certificates or credentials.

For health care professionals who are not physicians and are AFP subscribers, a record of CME credit is kept by AAFP and will be provided to you on written request. You are responsible for reporting CME hours to your professional organization.

NOTE: The full text of AFP is available online (http://www.aafp.org/afp), including each issue's Clinical Quiz. The table of contents for each online issue will link you to the Clinical Quiz. Just follow the online directions to take the quiz and, if you're an AAFP member, you can submit your answers for CME credit.

Instructions

Read each article, answer all questions on the quiz pages and transfer your answers to the Clinical Quiz answer card (bound into your copy of AFP). This will help you avoid errors and permit you to check your answers against the correct answers.

Mail the Clinical Quiz answer card within one year (by October 31, 2002). The bar code on the answer card contains your identification for CME credit hours.

Before beginning the test, please note:

Each Clinical Quiz includes two types of questions: Type A and Type X.

Type A questions have only one correct answer and may have four or five choices. Here is a typical Type A question:

CME Quality Survey

Please answer the following questions to help us monitor the quality of AFP's CME material on an ongoing basis. Mark your answers on this issue's quiz card. We would appreciate hearing any suggestions you have for improving the CME experience offered through AFP. See the directory on page 1119.

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