There is no authoritative data on how long it takes to see the effect of headache capsule, usually patients need to be taken orally for more than three days to gradually play a role in the efficacy of the treatment, but due to the existence of individual variability, can not be generalized. Headache capsule has the effect of quenching wind and removing phlegm, removing blood stasis and relieving pain, and can be used to treat migraine, tension headache, chest tightness and epigastric distension, irritability and other diseases. Clinically, there is no authoritative data to show how long it takes to see the effect after taking Headache Ning Capsule. Due to the relatively slow onset of headache capsule, most patients taking headache capsule more than three days, will begin to play the effect of the drug, but due to the different circumstances of the individual patient, some patients even slower onset of action, may need more than a week, can not be generalized, need to be based on their own situation to determine the synthesis. The adverse effects of the drug is not clear, allergic to the product is prohibited. The drug is a prescription drug and should be used in strict accordance with medical advice. Patients should go to the regular hospital in time if they feel unwell during the period of taking headache capsule.