Generally speaking, if you have a cold or flu, you can take Si Mu Tang, however, due to the different symptoms and physical condition of individuals, whether you can take it or not should be determined after diagnosis by a professional doctor.
This formula is composed of Wu Yao (乌药), which is used to move qi and relieve liver congestion, Shen Xiang (沉香), which is used to lower qi and calm asthma, Betel Nut (槟榔), which is used to move qi and remove stagnation and fullness in the heart, and Ginseng (人参), which is used to enhance qi and strengthen the body. Since there is no authoritative information on this formula specifying that it should not be consumed during a cold or flu, it can usually be considered acceptable to consume it if it meets the symptoms of the disease.
Si Mo Tang has the effects of dispersing knots and relieving chest congestion, promoting the downward movement of rebellious Qi (promoting the downward movement of upwardly rebellious Qi), and is suitable for the symptoms of Liver-Qi stagnation such as chest and diaphragm distension, inappetence for food and drink, and lumps and fullness under the heart, etc. This formula combines Qi movement with Qi lowering, and combines Qi destruction with Qi tonification to relieve stagnation and reduce rebelliousness without damaging the positive Qi. This formula should be used with caution in patients with spleen deficiency and kidney deficiency.
The side effects of Si Mu Tang have not yet been clarified, and this formula can be added or subtracted according to the patient’s actual condition, and the medication must be used in strict accordance with the doctor’s instructions.