It's called a tincture. I would presume the bud would have to be decarboloxated (sic) first, but tinctures are pretty popular as a medicinal way of consuming THC and CBD. It's probably more common to administer CBD that way, since it's a rather easy way for parents to give it to children in measured doses. But if one is taking THC for medicinal purposes and want a measured dose, in order to achieve the required effect without being completely high all the time, then a tincture would be a good way to consume THC. -Obviously how much THC one needs for medicinal purposes can vary wildly depending on the person, the medical issue, etc. Often medicinal strains are quite strong, but truthfully, a lower THC strain is just as valid for medicinal purposes, depending on the patient's needs.