Hibiscus sabdariffa might lower blood pressure. Taking Hibiscus sabdariffa along with medications that lower blood pressure might cause blood pressure to go too low. Monitor your blood pressure closely. Hibiscus sabdariffa tea might reduce the amount of chloroquine that the body can absorb and use.

October 17, 2025 - If you take medications for high blood pressure or diabetes, it can cause a significant drop in blood pressure. The plant also contains phytoestrogens (or plant estrogens) that may decrease the effectiveness of birth control medication.

This case study points to a possible connection between this patient’s hibiscus tea consumption and DVTs associated with IVF therapy. Whereas there may be a connection between the DVT prevention (via decreased blood pressure and coagulability), there may also be a connection to the ineffective IVF hormone treatment.

July 24, 2025 - To experience the benefits of hibiscus safely, moderation is essential: – Beneficial Amount: Consuming 1 to 2 cups (around 240-480 ml) of the tea per day is generally considered beneficial and has been associated with improved health outcomes. – Maximum Amount: It’s usually recommended to limit consumption to 3 cups per day, as higher amounts could lead to negative side effects, particularly concerning blood pressure and potential interactions with medications.

Abbreviations: AC, anthocyanin; C, control; DASH, Dietary Approaches to Stop Hypertension; DB, double blind; DBP, diastolic blood pressure; FPG, fasting plasma glucose; HCTZ, hydrochlorothiazide; HDL, high-density lipoprotein; HS, hibiscus; I, intervention; LDL, low-density lipoprotein; MeSy, metabolic syndrome; NAFLD, nonalcoholic fatty liver disease; PC, placebo controlled; PP, pulse pressure; RCT, randomized controlled trial; SBP, systolic blood pressure; TC, total cholesterol; TG, triglyceride. In summary, across all outcomes, 6 studies compared effects of hibiscus with those of a placebo,55,57,58,63,65,67 2 studies compared hibiscus with a preventive diet,54,61 5 compared hibiscus with another tea beverage,53,56,59,64,66 and 4 compared hibiscus with a known pharmaceutical medication.51,52,57,60 Participant health conditions were different across the studies.

April 30, 2025 - Hibiscus tea is a popular drink sometimes known as sour tea. Side effects. Hibiscus may cause blood pressure to drop.

June 11, 2021 - Some early research shows that drinking hibiscus tea for 2-6 weeks decreases blood pressure in people with mildly high blood pressure. Other early research shows that taking a hibiscus extract by mouth for 4 weeks may be as effective as the ...

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February 16, 2022 - High blood pressure affects nearly ... stroke, heart failure and kidney disease. In clinical trials, drinking hibiscus tea has been shown to lower blood pressure in humans....

There was a significant reduction in systolic blood pressure in both groups, but the mean reduction in systolic and diastolic blood pressure was significantly higher in the case group (P = 0.004 and P < 0.001, respectively). Using H. sabdariffa as sour tea two times a day can be effective in managing blood pressure in stage one hypertension along with lifestyle and dietary modification. Key words: Diastolic pressure, Hibiscus sabdariffa, hypertension, systolic pressure

September 10, 2025 - Low blood pressure: If you have pre-existing low blood pressure, drinking hibiscus tea could cause it to drop further, leading to symptoms.

September 14, 2025 - Researchers found that both human and animal trials have shown that hibiscus has a positive effect on both systolic (the top or first number) and diastolic (the bottom or second number) blood pressure readings.

September 30, 2025 - Consuming large amounts could potentially contribute to bleeding issues, so individuals on blood-thinning medications or with bleeding disorders should consult with a healthcare professional before incorporating it into their diet.

December 6, 2024 - To date, there is no scientific evidence of hibiscus tea side effects making people drunk and/or causing hallucinations. A common theory for why ‘hibiscus intoxication’ happens is that it’s result of peoples’ blood pressure becoming too low.

March 21, 2025 - Hibiscus tea is often praised for its potential to lower blood pressure. However, this effect can be problematic for individuals who already have low blood pressure or are taking antihypertensive medications.

The blood-pressure lowering effects of hibiscus tea, according to the researchers, may be due to its relaxing action on blood vessels or to the vessel-protecting effects of its flavonoid (anthocyanin) content.

September 6, 2021 - A study in Nigeria discovered hibiscus ... The most significant finding was that hibiscus tea, unlike its study counterpart, hydrochlorothiazide, did not cause electrolyte imbalance....