1. It's possible DD doesn't realize there's a problem with taking Nyquil etc.
I believe in innocence first. She might not even know it contains alcohol.
2. I take Magnesium Glycinate (from Metagenics) when I can't sleep, or Calcium/Magnesium/Zinc from Trader Joe's (all over California... not sure how far across the country they are now), or a big glass of milk.
3. My 14 year old son says 'lock it up & talk to her about it, not necessarily in that order'. DH says 'lock it up first'
4. I agree with DS,
Communication is key, and honesty. If she denies it then you might need the food coloring. There is a reason Ipecac is harder to find these days; it can be dangerous. Even if it does no harm, the nausea goes on long after the stomach is empty; she would feel betrayed and alienated and we all should know where that road can lead.
5. I would find a good Naturopath, as well as counseling & Pedi consultation (depending on how the first conversation goes.. see #1)
6.
& blessings to your whole family (who knows, Gram might even have some pearls of wisdom, and acceptance)
7. aww shucks I took so long typing that I missed you trying the dye. I still say talk first.
8. <<quote...I also transport students to church schools and a lot is going on there too...>>DH says he got la*d more in church camp than anywhere else in his LIFE.