The most common side effects are stomach and intestinal problems, headache, drowsiness, and dizziness. Heavy use of kava kava can produce a scaly skin rash or problems with your vision, including dilated pupils. Do NOT use kava kava during pregnancy or while breast-feeding. Do NOT use kava kava if you are mentally depressed. Do NOT drive or operate heavy machinery unless you are fully alert and can see clearly.
Some natural remedies have the same effects as prescription medicines.
This means there is a danger of being overmedicated. If you have any unusual effects while taking any natural remedy, get advice from a doctor right away. Natural remedies and prescription medicines may interact. Lack of standardization may result in products with different strengths and effects. Lack of quality control may allow contamination of products.