Is there any side effect of drinking sumac in water for a long time?

The side effects of Sulforaphane are not clear at present, but as it is a medicine for promoting blood circulation and removing blood stasis, prolonged intake of this medicine or improper use of this medicine may result in epistaxis (nosebleed), hemoptysis, subcutaneous purpura, prolonged menstrual period in females, and metrorrhagia (menstrual bleeding in excessive amount or more than a few drops), and other discomforts.
In addition, single medicine is not effective in treatment. It is recommended to formulate formulae and combinations with other medicines after diagnosis by a medical practitioner in order to enhance the efficacy.
Sumac is the dried heartwood of the leguminous plant Sumac, which is sweet, salty and neutral in nature, and belongs to the heart, liver and spleen meridians, with the efficacy of activating blood circulation, eliminating blood stasis, subduing swellings and relieving pain. It is used in the treatment of bruises, fractures and tendon injuries, stagnation, swelling and pain, menstrual dysmenorrhoea, post-partum stagnation and obstruction, stabbing pains in the chest and abdomen, and carbuncle and gangrene (a kind of venomous sores, which is an acute suppurative disease that occurs in the surface of the body, the limbs, and the internal organs), swelling and pain, and other conditions.
Pregnant women should use this product with caution.
When discomfort occurs, you should consult a doctor in time and choose medication under the guidance of physician’s diagnosis, do not use medication on your own, so as not to delay the condition.