LOL, try it, Tonic water is certainly harmless. Even more harmless with Gin but I just drank the Tonic water with a slice of lime.
Jerking and twitching, at sleep can be lactic acidosis and is improved when you exercise. I found mine went away almost entirely the harder I pushed aerobic exercise and the more conditioned my legs became. With all the rain these last few days I haven't ran. I noticed it last night when my legs would not 'relax' LOL.
I had bilateral pain in my tibiae that were also referred to as growing pains in my youth, it frustrated the crap out of me even as a kid, that they would be that non specific.