Whether or not 30 grams of Sumac can be taken internally cannot be generalized, but should be based on the needs of the condition, the preparation of the Chinese medicine and the concoction. But generally speaking, it is not recommended to take 30 grams of sumac internally, because sumac in the Chinese Pharmacopoeia is clearly internal dosage of 3 grams to 9 grams, so sumac 30 grams internally, is an overdose. Sumac, sweet and salty in flavor, flat in nature. It belongs to heart, liver and spleen meridians. It has the efficacy of promoting blood circulation, eliminating blood stasis, subduing swelling and relieving pain. It is used for bruises, fractures and tendon injuries, stagnation and swelling, menstrual pain, postpartum stasis, chest and abdominal pain, carbuncle and gangrene (a kind of poisonous sores, occurring on the surface of the body, limbs, internal organs of the acute suppurative disease), pain and swelling, and so on. It can activate blood circulation and dissipate blood stasis, reduce swelling and relieve pain, and is a product for promoting blood circulation and eliminating blood stasis, and the main medicine of the Department of Injury, often used with frankincense, myrrh and natural copper; it is also often used with Rhizoma Ligustici Chuanxiong, Radix Angelicae Sinensis, Radix Angelicae Sinensis, Rhizoma Saffron to treat blood stasis and menstrual closure, dysmenorrhea, and post-partum stagnant abdominal pain; and with Salviae Miltiorrhizae, Rhizoma Ligustici Chuanxiong, and Rhizoma Yanhu, for treating stagnant pains of heart and abdomen. Before taking this medicine, you need to be guided by a Chinese doctor for identification of symptoms and should not take the medicine on your own to avoid adverse effects on the body.