Dxm is VERY VERY dangerous. My brother almost died from taking too much of it and permanently damaged his mental health. We even think it may have induced his bipolar disorder. Dxm is absolutely the last substance you should ever put in your body if you're having mental issues. Frankly I can't believe it hasn't been banned in th US yet. Cold medicine is bad for you to begin with (it can double the duration of illnesses) and dxm is just toxic.

Ephedra is bad for you too and was banned for good reason. If you need a boost, you should take a combination of ginsing, green tea, and caffeine. It's much safer and effective too.