Meth+RobitussinDM

First off i am not mixing these to get high. I know its a dangerous combo. My girlfriend and i smoked some meth between 2-3pm today. She has a cold and has has taken DayQuil and cap of RobitussinDM. Never thought about the interactions it would have with meth until about 10minute, when she said she was going take another cap then try to go to bed. The doses are pretty spaced out so im not to worried. But i thought i would check here just to be safe.

Added up the amount of DXM she took and its was 55mg. Thinking about it, thats really not that much and probably not going to do any harm. I was just worried i guess.

No problem at those dosages man, rest easy.

That was my hunch. Thanks for clearing that up