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Incontinence & Overactive Bladder Health Center

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Incontinence Drug Doesn't Affect Memory

New Drug for Urinary Incontinence Has Fewer Cognitive Side Effects
By
WebMD Health News

March 31, 2004 -- The manufacturer of a new treatment for overactive bladder says its drug may be less likely to affect the memory than currently available therapies. In a study reported late last week, patients taking Enablex showed no evidence of memory or other cognitive problems.

Researchers say the new medication called Enablex treats urinary incontinence from overactive bladder by specifically targeting the bladder muscles that control urinary urges. They also say the drug is less likely to affect the brain and have side effects such as memory problems compared with other drugs that are currently on the market. But an incontinence expert contacted by WebMD says that cannot be proven until the medications are compared to each other.

"Right now (Enablex) has a theoretical edge, but it is certainly not a proven edge," says University of Pennsylvania urology professor Alan Wein, MD. "The only way to prove the edge is by comparing it to the other drugs in head to head studies."

M3 Receptor

An overactive bladder is known to cause a sudden and uncontrollable urge to urinate frequently. With an overactive bladder, the muscles of the bladder become spastic causing bladder contractions and involuntary urine loss. They are a few treatments that can be tried in people with the condition including biofeedfack, surgery, and medications that cause bladder muscles to relax.

Although medications used to treat an overactive bladder are effective there have been isolated reports of central nervous system impairment associated with widely prescribed overactive bladder drugs such as Detrol (Pfizer Pharmaceuticals) and Ditropan (Ortho-McNeil Pharmaceuticals).

These drugs, known as anticholinergics, act on the M3 receptor and cause bladder muscles to relax. This antispasmodic effect prevents the involuntary release of urine in people with overactive bladders. But they also act on other receptors associated with brain function and heart rhythm and side effects that can be caused by these drugs include confusion, headaches, drowsiness, and rapid heart rates.

According to a spokesperson for Enablex manufacturer Novartis, the new treatment more directly targets the M3 receptor. He added that the company hopes to launch its overactive bladder drug in the U.S. this year, pending Food and Drug Administration approval.

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