Nighttime leg cramps commonly affect adults over the 50 years of age, but are also known to occur in younger adults and children, and their cause is unknown. The findings could have implications for clinical practice in countries where quinine is still in widespread use for preventing nocturnal leg cramps despite safety warnings.
During the study, researchers tracked the number of new prescriptions for quinine (commonly prescribed to treat leg cramps) among adults over 50 years of age in British Columbia (B.C.) from Dec. 1, 2001 to Oct. 31, 2007. They found that about 31,339 people began taking quinine during that period, 61 percent of whom were female. They also examined the number of Google searches for 'leg cramps' originating in the United States and Australia over an 8-year period.
Nocturnal Leg Cramps
Nocturnal leg cramps are painful muscle contractions, which occur in the calf, foot or thigh muscles at night.
It was seen that prescriptions for quinine peaked in B.C. in July, as did Google searches in the United States. Google Trends data also indicated a similar peak for the search term in Australia in the month of January, which is near mid-summer in the southern hemisphere.
The findings are published in the Canadian Medical Association Journal.
Source: Medindia
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