I didn't know this so I wondered if others didn't, too. I was at my check up with the doctor today and I was asking him to switch inhalers for me, ( I got asthma) and, this particular one cause leg cramps so badly, I jump up out of bed. Well, he said, he wouldn't change the inhaler, lol, but, he told me to drink a cup of tonic water with quinine before bedtime, it said it would work. So, I stopped at bought 4 bottles for 3 bucks, cheap enough if it works. Thought I would pass it along incase anyone else is suffering with those things. I tried the bananas and drinking regular water, and even he said, it wouldn't work. They didn't.