Magnesium citrate
constipation
"Was prescribed this for an upcoming colonoscopy and had to take two full bottles of it. A day apart. 
It gave me a very bad headache and made me feel bloated . My system is slow anyway which is why I'm getting the procedure .
It definitely works but I didn't get very dramatic results with the first bottle . I don't think I will ever drink anything lemon or lime again for a while !"