Difenidol Hydrochloride Tablets is a drug with the function of regulating the vestibular system, inhibiting the vomiting center and improving the inadequate blood supply to the vertebral basilar artery. It can be used to treat vertigo, nausea and vomiting caused by Meniere’s disease, vertigo and other diseases of the ear, nose and throat. It can also be used for motion sickness, such as taking it orally half an hour before taking a bus, boat or airplane, which can prevent motion sickness and airsickness symptoms to some extent. This is an over-the-counter drug, and Difenidol Hydrochloride Tablets mainly have some inhibitory effect on the nerve center to reduce the effects of motion sickness. Since Difenidol Hydrochloride Tablets can have a nerve-paralyzing effect, be careful not to overdo it when taking motion sickness medication, as overdose intake may lead to coma and the situation may be life-threatening in severe cases. If you experience adverse reactions after taking motion sickness medication, especially chest tightness and drowsiness, you need to seek prompt medical attention.