Generally taken in capsule or pill form, Kava Kava can also be taken as a tincture or a tea. People who shouldn't take Kava Kava include those who are depressed, people who take barbiturates, pregnant or breast feeding women, or if you plan to take it for longer than three months.If used as a decoction 2g -4g should be taken a maximum of 3 times daily. The Kava Kava decoction can be made by boiling the herb in water.