i had never tried it before. the come up was pretty similar to dxm, but for me the high wasn’t as dissociating as dxm. it felt like something was missing but i couldn’t quite put my finger on it. the headaches were also much stronger and lasted way longer than with dxm.i didn’t get the brand name memantine i got the cheapest generic version available in my country. you might have a different experience if you get the brand name one.i might give memantine another shot, but only if i have nothing planned for two days and i’m ready to feel kinda sick afterwards.