Dizziness is considered to be a side effect of the drug, which can be seen clinically in many drugs after eating, the patient can appear dizzy. First, the most common is sleep medication, due to the patient’s sleep disorder, oral sleep medication can appear dizziness, consider the sedative effect of the drug, resulting in the patient dizziness, after drug metabolism dizziness can be alleviated. Second, for the treatment of Parkinson’s disease drugs, the patient will be dizzy after eating, consider and sedation also have a relationship, which is also part of the treatment of Parkinson’s drugs affect the function of the extrapyramidal system, can also appear dizziness. Third, vasodilator drugs, patients need to improve circulation and other symptomatic treatment of oral vasodilator drugs, due to vasodilatation leads to peripheral vasodilatation, serious will appear in the brain blood supply, can also appear dizziness, so take drugs dizziness is considered a side effect of drugs.