Quinine is very bitter....very. It does not take much to flavor tonic water.

I believe one report I read was 20mg/6 oz. The typical RX dose for quinine for leg cramps is 260mg. So it would take about 86oz to get an Rx dose equivalent.

I do not believe quinine is of use. It is much better to pay attention to
calcium/magnesium and potassium.

But I'll tell you a surprise thing I did a few nights ago. My right great toe has been hurting alot, a sharp pain, and my foot in general burns alot. So I tried some hydrocortisone cream on it (I thought the skin was very dry under the toes)...and my HC has aloe in it...and guess what. Alot of the pain is gone.
I've only used it twice in a week! I am thinking some HC was absorbed?
I've had really burning feet all summer, more than usual. I will continue with this new development and let everyone know on a separate thread.