Who should not take kava?

Could you elaborate on the potential risks or contraindications for individuals considering the use of kava? Is there a specific group of people, such as pregnant women, breastfeeding mothers, or those with certain health conditions, that should refrain from consuming kava? Additionally, are there any known drug interactions that could arise from combining kava with other medications? Understanding these potential risks is crucial for individuals to make informed decisions about their health and wellbeing.