I smoked weed then took metadate, and i'm still high after 4 days. what should i do?

Need Evaluation: There are several possibilities, so the best recommendation i can give would be for you to get evaluated in an urgent care or er setting. It would be unusual for a single episode of maijuana or metadate use to cause this. I would be concerned that something may have been mixed with the weed.

Metadate & Cannabis: Combining Metadate & Cannabuis may trigger mania. See: https://www.longdom.org/open-access/cannabis-and-methylphenidateinduced-manic-symptoms-2161-0495-1000254.pdf * Don't know what contaminants may have been in the Cannabis. Please seek prompt medical care for the harm you have caused yourself.