Harvard Women's Health Watch

Will tonic water prevent nighttime leg cramps?

Ask the doctor Q. It’s been suggested that drinking 2 to 3 ounces of tonic water before bedtime can prevent leg cramps at night. Is that true? A. Tonic water—and the quinine it contains—have been promoted for preventing leg cramps for decades despite the lack of evidence that they are effective. Quinine is FDA-approved only for treating malaria and is sold with a warning against using it to treat leg…

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