This is very possible. There are a number of things present in the oil. The 4 main components present are mostly limonene, alpha-phellandrene, elemol, and elemicin. The other components are present in pretty small mounts, most less than 1%. I cannot find information on elemol concerning its effects in man. Maybe this is a sedative.

Yes, I believe it can increase productivity in a way similar to shrooms. At least SWIM's batch of elemi oil can. A dose of 2-5 drops is good for this. But it won't work well 2 days in a row.