Gastrodia elata can be taken with water and has the following functions. Directory? 6? 1 efficacy and function? 6? 1 efficacy and function of adverse reactions 1, calming the liver and calming the wind. Gastrodia elata can nourish blood and stop wind. Can be used for treating headache and dizziness caused by blood deficiency and liver wind, and infantile convulsion, epilepsy and tetanus. 2, dispel wind and relieve pain. Used for dizziness, headache, numbness of limbs and hemiplegia caused by wind phlegm. Side effects: Gastrodia elata has the function of stopping headache and dizziness, so people often take it as a tonic. When they see dizziness or weakness, they will eat gastrodia elata casually. Do not analyze the main causes of headache. Possible adverse reactions include dizziness, nausea, chest tightness, skin papules with itching and so on. Some people will also have facial or systemic edema and even hair loss. Not only does gastrodia elata have this kind of reaction, but some people also have symptoms of allergic to gastrodia elata after taking decoction containing gastrodia elata, such as Banxia Baizhu Tianma Decoction, Tianma pills, Tianma sugar-coated tablets and other Chinese patent medicines. Gastrodia elata Therefore, we should pay attention to the following points when using Gastrodia elata: 1. All patients should use Gastrodia elata with caution when they see body fluid deficiency, blood deficiency and yin deficiency. 2. Pay attention to compatibility and applicability. "Herbal Yi Yan" has a description that "Gastrodia elata must be supplemented with other drugs, and then see its merits". Ancient and modern physicians rarely use gastrodia elata alone, but mostly use drugs according to different diseases and syndromes. Such as: Banxia Baizhu Tianma Decoction, Tianma Gouteng Drink, Tianma Pill, etc. Gastrodia elata is not effective or the effect is uncertain in clinic. 3. Even in the case of hyperactivity of liver yang and obstruction of collaterals by phlegm, we should carefully examine Gastrodia elata and grasp the pathogenesis in order to achieve good therapeutic effect. 4. Gastrodia elata should not be fried for a long time. Gastrodia elata is the main component of gastrodin, which is easily volatilized when heated. Gastrodia elata and other drugs will lose their effective components of sedation and analgesia due to heating. Therefore, it is best to wet Gastrodia elata with a small amount of water, soften it, cut it into thin slices, dry it in the sun or grind it into powder, and take it with the decoction, or grind it into pills and powder. 5. When gastrodia elata or gastrodia elata preparation is used alone, dizziness, chest tightness, shortness of breath, nausea and vomiting, accelerated heartbeat and itching of the skin occur. If it happens, stop taking the medicine immediately, and those with severe symptoms should go to the hospital in time. 6. Gastrodia elata can't be used with Yufeng grass root, otherwise it will cause intestinal knot.