There is a type of flower native to Asia that has substances known to create a giddy effect on the brain. It is non-addictive and rarely fatal. It is hard to extract a therapeutic dose from the plant, but bees do the work for you. The honey of some bees contain trace amounts of this drug in the nectar that they gather. It is enough to induce a high while not enough to cause bodily damage. Be cautious, as dose does depend on the honey sample.
Buy mad honey from a reputable merchant on the web. The great thing about this product is that it is sold as a jar of honey. It is rather hard for law enforcement to tell the differences, and normal drug tests show up nothing because it is a lesser known product. Typically, the product arrives safely, and suggested service is a small amount mixed in with water.