Navigation Links
Drug Prescribed for Migraines and Seizures Increases Risk of Kidney Stones

Topiramate (Topamax), a drug commonly prescribed to treat seizures and migraine headaches, can increase the propensity of calcium phosphate kidney stones//, researchers at UT Southwestern Medical Center have found.

A study – the largest cross-sectional examination of how the long-term use of topiramate affects kidney-stone formation – appears in the October issue of the American Journal of Kidney Diseases.

Several case reports have described an association between topiramate and the development of kidney stones, but this complication had not been well recognized and physicians have not informed patients about the risk, the UT Southwestern researchers said. More important, the mechanism of stone formation was largely unknown previously.

“The wide-spread and escalating use of topiramate emphasizes the importance of considering the long-term impact of this drug on kidney-stone formation,” said Dr. Khashayar Sakhaee, senior author of the study and chief of mineral metabolism at UT Southwestern.

More than 29 million Americans suffer from migraines, with women being affected three times more often than men, according to the National Headache Foundation.

“Topiramate is probably one of the most commonly prescribed and most effective neurological medications right now,” said Dr. Dion Graybeal, assistant professor of neurology and an author of the study.

Dr. Graybeal and other researchers at UT Southwestern say the next step is to develop a way to block the development of kidney stones for users.

The study comprised two phases. Thirty-two individuals already being treated with topiramate and 50 normal volunteers were enrolled in a cross-sectional study in which their blood and urine were tested for kidney-stone risk. A short-term study also was conducted in seven individuals to assess stone risk before and three months after taking topiramate. All patients were evaluated at UT Southwestern’s G eneral Clinical Research Center.

Researchers found that taking topiramate on a long-term basis, or for about one year, caused systemic metabolic acidosis – a buildup of excessive acid in the blood – as a result of the inability of the kidney to excrete acid. Topiramate use also increased the urine pH and lowered urine citrate, an important inhibitor of kidney-stone formation.

“These changes increase the propensity to form calcium phosphate stones,” Dr. Sakhaee said.

In the short-term study, urinary calcium and oxalate – a chemical compound that binds strongly with calcium and is found in most calcium stones – did not significantly change in people taking topiramate.

Kidney stones are solid deposits that form in the kidneys from substances excreted in the urine. When waste materials in urine do not dissolve completely, microscopic particles begin to form and, over time, grow into kidney stones.

Before this study, the rate of kidney-stone formation with topiramate was reported as 1.5 percent. The low incidence rate may be an underestimation due to the short length of observation and the lack of ongoing kidney-stone surveillance and data collection for this drug, said Dr. Sakhaee, holder of the BeautiControl Cosmetics Inc. Professorship in Mineral Metabolism and Osteoporosis.

“There is a legitimate concern for the occurrence of kidney stones with long-term topiramate treatment,” said Dr. Sakhaee said. “Studies are needed to explore optimal measures to prevent kidney-stone formation with topiramate use.”

Other UT Southwestern researchers contributing to the study were Dr. Orson Moe, director of the Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, Dr. Naim Maalouf, assistant professor of internal medicine and Dr. Brian J. Welch, a postdoctoral fellow in internal medicine.

The research was supported by the National Institutes of Health.

Sourc eNewswise
SRM
'"/>




Related medicine news :

1. Bar Codes For Prescribed Drugs
2. Life-Saving Heart Drug Often Not Prescribed
3. Self-Prescribed Vitamins And Herbal Remedies Can Do More Harm Than Good
4. Statins Prescribed To Those Who Are At a Risk Of Developing A Heart Disease
5. AHRQ Finds Antibiotics Over-Prescribed To Children
6. Exercise to be Prescribed for Robust Health in Elderly
7. Widely Prescribed Diabetes Drug Falls Short of Promise, Says New Review
8. No Dying in Peace for Woman Prescribed Medical Pot
9. Hormones Linked To Migraines
10. Link Between Migraines and Behavioral Disorders
11. Preventive Therapies Found to be More Effective in Managing Migraines
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/25/2017)... , ... April 25, 2017 , ... ... a modern procedure that achieves results in a fraction of the time as ... Vegas, NV, with Significance Dental Specialists, now offers this revolutionary treatment with or ...
(Date:4/25/2017)... RESTON, VIRGINIA (PRWEB) , ... April 25, 2017 ... ... scientists leading the way in unveiling cutting-edge birth defects research related to Zika ... recognized by the world’s premier society for this important science. , ...
(Date:4/25/2017)... ... 2017 , ... Buyers and sellers in the thriving multi-billion dollar cannabis marketplace ... help but be heartened by the industry’s current surge. But another thing that unifies ... smell.” At last they can simply, safely and effectively end their aroma anguish ...
(Date:4/25/2017)... (PRWEB) , ... April 25, 2017 , ... ... addition of predictive analytics to its patient care management module. Using this new ... before a patient has been initiated on continuous positive airway pressure (CPAP), oral, ...
(Date:4/25/2017)... ... April 25, 2017 , ... There is no better place in South Florida ... report in the May issue of Consumer Reports focused on heart health. , ... achieved during and after coronary bypass and aortic valve replacement procedures. , Consumer ...
Breaking Medicine News(10 mins):
(Date:4/20/2017)... WOONSOCKET, R.I. , April 20, 2017 /PRNewswire/ ... (NYSE: CVS), today unveiled a new store design ... new assortment of healthier food, health-focused products and ... the store to help customers discover new offerings. ... represent the next evolution of the customer experience ...
(Date:4/20/2017)... Research and Markets has announced the addition of ... Regional Outlook, Growth Trends, Key Players, Competitive Strategies and Forecasts, ... ... at US$ 7,167.6 Mn in 2015, and is expected to ... of 5.6% from 2016 to 2024. The ...
(Date:4/20/2017)... Research and Markets has announced the addition of the ... Service (Manufacturing, Research), By Country, (Brazil, Mexico, Colombia, Argentina, Chile, ... their offering. ... Latin American pharmaceutical contract manufacturing services market is anticipated to ... registration cost in Latin American countries and continuous economic growth ...
Breaking Medicine Technology: