Theophylline tablets are a combination of aminophylline and diphenhydramine and are mainly an anti-dizziness drug, also known as multiplying dizziness. Its side effects are mainly drowsiness, lack of concentration or fatigue, gastrointestinal discomfort in a few cases, and in severe cases, unresponsiveness, and in rare cases, more rare side effects, such as hallucinations and even loss of vision. For people with motion sickness, motion sickness, seasickness or riding in some amusement park spinning facilities, dizziness and motion sickness may occur, which are often caused by sensitive vestibular function, and can be taken when motion sickness attacks are severe, the incidence of side effects is still relatively small.