The sleepiness is from eucalyptol.

Elemicin way overpowers the smell and taste of eucalyptol. If you can smell eucalyptol in the presence of elemicin, there must be a lot of it present. Keep in mind that the Triple E tech extracts both elemicin and eucalyptol almost equally. This is so unfortunate. The good thing is that elemicin is more potent then eucalyptol, so even in oil that has the same levels of each, like a lot has, the elemicin is the more dominant in effect. But even then, it’s better without eucalyptol. There’s got to be a way to get rid of the eucalyptol. Eucalyptol is not pleasant and blocks a lot of the nice effects elemicin has. SWIM is trying several things and is sure a way will be found to remove it.