How To Remove Methamphetamine From Body?

My 24.year old daughter smoked meth (thought she was smoking marajuna) but, afterwards her friend told her it was meth. Today is Tuesday and this occurred on Sunday afternoon. She has been awake, little food or liquid. I just found out and am here with her -- she appears to be ok. But, concerned for obvious reasons., dehydration. I told her if she doesn t drink I will need to take her to hospital. She will not willingly go. I m not sure what to do.