Du Liang soft capsule how long to take the effect needs to be based on individual circumstances, the symptoms of light people see the effect of fast, heavy people need a longer period of time, but after taking the drug 3 days after the symptoms did not improve, or symptoms worsened, or the emergence of new serious symptoms, you should stop the drug and go to the hospital for medical treatment. Du Liang Soft Capsules, composed of Angelica dahurica and Rhizoma Ligustici Chuanxiong. It has the efficacy of dispelling wind and dispersing cold (dispelling wind evil and dispelling cold evil), activating blood circulation. Used for headache is wind-cold blood stasis blockage of the veins and channels, the symptoms of headache or tingling, pain has a fixed place, recurrent attacks, induced or aggravated by wind and cold. Adverse reactions: Individual patients with epigastric discomfort, nausea, dizziness, abdominal pain, vomiting, skin rash, headache and so on. Pregnancy and lactating women are prohibited to take. It is prohibited for those who are allergic to this product and the ingredients contained in it. In case of discomfort, it is recommended to seek medical advice. If medication is needed, it should be identified by a doctor and regulated according to the doctor’s instructions.