Effects - Kava-Kava extract question

[genaro]

I have a kava extract which is 60% kavalactones.
It's a thick paste inside a graduated syringe (I have a total of 10mL).
The smartshop who sold it sent me a notice telling me not to exceed the daily dosage of 0.2mL
I took 1mL at once (on empty stomach) and had no effects beside a very slight initial ophoria (for 30minutes) followed by some strong sedation & muscle relaxation which lasted for 2 hours.
I read kava is supposed to produce strong ophoria/laughing & deep blissful relaxation.
Any comment or advice would be apreciated so I can understand better why I have so weak effect when taking 5times the recommended dose.

There's a guy which posted a report on erowid.org, he had good effects with a quantity of kava root powder which is equivalent to 3g of my extract !
That would mean that to achieve good effects from my 60% extract I might need to take 15 times the recommended dosage ! This does seem strange to me...