Dexedrine is also called haloperidol melitrexin tablets. Dexedrine is mainly used to treat mild to moderate depression and anxiety. The reason why Dexedrine should be taken in the morning is this, because Dexedrine can cause insomnia, and insomnia is the most frequently occurring side effect. Patients may experience insomnia, restlessness, and agitation after taking the medication. Therefore, in this case, the medication is usually not taken at night, but in the morning and at noon, which will have less impact on the patient’s sleep at night. It may also cause dry mouth, constipation, dizziness, fatigue, cholestatic hepatitis, etc. Therefore, it is important to pay attention to the medication and consult a doctor if there are any abnormal manifestations after taking it.