While it is not known to be possible to OD on thc, it IS possible to overdo it until you don't feel good about it. Just do one or the other. If you're smokin good weed, why add the hash? and if you're smoking good hash, why mix it with weed...??? Seems like you may be overdoing it. Me? I can smoke weed, eat hash, chase it with some green dragon and then have a few magic brownies and still feel pretty good...I don't know my name for a few days, but....LOL!