A 2013 review of studiesTrusted Source reported that very high doses of hibiscus extract could potentially cause liver damage. The same review reported that hibiscus extract was shown to interact with hydrochlorothiazide (a diuretic) in animals and with acetaminophen in humans.
Individuals who drink herbal teas should let their doctors know, as some herbs have the potential to interact with medications.
According to other sources, hibiscus consumption is not safe for people who take chloroquine, a medication for malaria. Hibiscus may decrease how well the medicine works in the body.
People with diabetes or on high blood pressure medications should monitor their blood sugar and blood pressure levels when consuming hibiscus. This is because it may decrease blood sugar or blood pressure levels.
Pregnant or breastfeeding women should not drink hibiscus tea.
Drinking hibiscus tea in moderation is generally considered safe. However, other products containing hibiscus are not regulated and may or may not contain what they claim. These include:
supplements
capsules
extracts
Source; medicalnewstoday.com
