How would you know if you were given GHB? symptoms etc and did it happen to you... my sis thinks she may have?

been ghbed and she is sick about this and I am too

: http://alcoholdrugstreatment.info/how-would-you-know-if-you-were-given-ghb-symptoms-etc-and-did-it-happen-to-you-my-sis-thinks-she-may-have