OK let me be the first to say the robotrippin is very freakin dangerous and by no means good for you. People have died doing that. Not only that it can cause permanent irreversable damage to you organs like kidney's liver. Google it. You have a reason to be conserned about your bro. When you trip on DM you are taking on average 20X the recommended dose. 20X that is overdoseing to a massive extent. Some have recorded maxing out to there body wieght and going into a coma for 24 hours. Please stay away from that ****. If you want to trip shroom it. but not DM.
That said. Why on earth would you want to screw up the great taste of weed by dumping nasty tasting cough syrup on it.
Besides the DM is not a smokable drug. it can only be ingested.