Risks. Avoid hibiscus if you are allergic or sensitive to it or members of the Malvaceae plant family. Use with caution if you have low or high blood pressure. Also use with caution if you are pregnant or breastfeeding, as little is known about its safety in these cases.
Interactions. Hibiscus tea may interfere with the effectiveness of some anti-malaria drugs.
Tell your doctor about any supplements you're taking, even if they're natural. That way, your doctor can check on any potential side effects or interactions with any medications.
The U.S. Food and Drug Administration (FDA) does regulate dietary supplements; however, it treats them like foods rather than medications. Unlike drug manufacturers, the makers of supplements don’t have to show their products are safe or effective before selling them on the market.