Have you tried kava before?

My MIL left instructions that i'm supposed to keep an eye on the domestic helper and to let her know what and where to clean. She's down with another bout of anxiety attack and needs to rest. I told her to start with the kitchen as it's the dirtiest place of all. Then, move onto the walls and windows ending with the floor. I only had 4 hours sleep. A relative called up to ask how's my MIL doing and she wanted to bring a bottle of kava over for her to try. Was told it helps with anxiety attack. i told her to ask her herself when she wakes up. I'm so not making any decisions for her.