Abortion: Guizhi Fuling capsule has been widely used in drug abortion. Modern research shows that cinnamon oil contained in cassia twig will lead to abortion if used in large quantities.

Dry throat: patients with epigastric pain and dry throat due to deficiency of spleen and stomach are prone to aggravate throat symptoms after treatment with Guizhi medicine. In this kind of patients, epigastric pain is manifested as deficiency and cold of the spleen and stomach, stomachache prefers warm pressure, aversion to cold limbs, white and greasy tongue coating, pale tongue, heavy and thin pulse and so on. Symptoms of epigastric pain accompanied by dry throat, such as nasal congestion, are mostly caused by deficiency-heat and inflammation of the throat. Aconite can be used instead of cassia twig to warm the yang and warm the middle, and it can be submerged in fire. If cassia twig is used, it is easy to get angry and aggravate throat symptoms.

Autonomic nerve dysfunction: when the dosage of cassia twig is too large, symptoms such as sweating, fatigue, limb weakness and palpitation often appear.

Menstruation: Dysmenorrhea patients with internal stagnation of fire are likely to cause an increase in menstrual flow after using cassia twig.

2. Taboo:

Indications: Ramulus Cinnamomi is warm in nature and helps heat. Improper use may injure yin and promote blood circulation, so it is not suitable for febrile diseases, excessive fire due to yin deficiency and bleeding. Pregnant women, people with excessive menstrual flow and autonomic nervous dysfunction should not use it.

Strictly control the dosage, according to the condition and individual dosage, and prohibit over-dose application. The dosage of Ramulus Cinnamomi depends on the change of illness and individual differences, but the maximum dosage should not exceed 12g.

Cinnamomum cassia twig and its preparation should be used under the guidance of a doctor to ensure the safety and effectiveness of medication.