Dendrobium flowers and Cordyceps sinensis boiled together with water to drink feel dizzy may be because of allergy to drugs, improper use of drugs, medication is not symptomatic and so on. 1. Drug allergy: for patients with allergies, or people who are allergic to dendrobium flowers and cordyceps, it is easy to have dizziness, headache, nausea, rash and other allergic manifestations after taking them together. 2. Taking drugs improperly: dendrobium flowers and cordyceps boiled water to drink feeling dizzy, may also be the patient did not follow the doctor’s instructions or not in accordance with the dosage of drugs to standardize the use of medication, thus appearing dizziness and other adverse reactions. 3. The drug is not right: dendrobium flower is slightly cold, with stomach and fluids (tonic spleen and stomach, nourishing fluids), nourishing yin and clearing heat, treatment of fever and fluids injury, dry mouth and thirst, gastric yin insufficiency (lack of yin fluid in the stomach), deficiency of post-disease fever, yin deficiency and fire, etc.. Those with cold spleen and stomach, those with deficiency without fire, those with loose stools, and those with thick and greasy tongue coat are prohibited to take Dendrobium flower. Cordyceps Sinensis is calm in nature, with the effects of stopping bleeding, resolving phlegm, tonifying the kidney and benefiting the lungs, and is used for treating deficiency of the kidney and essence, impotence and spermatorrhea, and prolonged coughing and wheezing. Those with superficial evil (evil qi on the muscle surface) and those with Yin deficiency and fire are not recommended to take Cordyceps. If the patient’s disease pattern does not match with the indications of the above medicines, taking them may also cause the patient to experience dizziness and other symptoms. Therefore, dendrobium flowers and cordyceps boiled together with water to drink feel dizzy, if the symptoms are more serious, you should go to the hospital in a timely manner, let the doctor to give treatment, do not delay the condition.