There are the following reasons for not drinking alcohol after taking motion sickness medication: The first reason is that after patients take motion sickness medication, the ingredients in motion sickness medication are mainly some antihistamines and antiemetic ingredients. If patients drink alcohol at this time, the interaction between alcohol and drugs may lead to toxic reactions, such as respiratory depression, drowsiness, headache, dizziness and other related manifestations. The second reason is that patients who drink alcohol after taking motion sickness medication are prone to gastrointestinal discomfort, such as nausea, vomiting, stomach pain, and other related symptoms. All in all, it is not recommended that patients drink alcohol after taking motion sickness medication. Drinking alcohol will only lead to continued aggravation of symptoms and will not have a therapeutic effect, and may even pose a life-threatening risk. Clinically, if a patient drinks alcohol after taking motion sickness medication, he or she needs to be actively seen by a hospital and, if necessary, undergo gastric lavage and other related treatment.