Can’t sleep after taking dexamethasone, it may be a side effect of dexamethasone, dexamethasone has a certain excitatory effect, individual patients may cause mental excitement after using the drug, it may also cause sleep disorders. If the above situation occurs, it is recommended to stop using the drug, the drug is an anti-inflammatory, anti-toxic, anti-allergic drugs, the role of a wide range of side effects, the patient can be osteoporosis, may also be the femoral head necrosis, easy to cause the patient’s blood lipids, blood glucose elevation and so on. If the elderly, generally try to prohibit or use with caution, children should also be used with caution or prohibited. The drug is suitable for nephritis or demyelinating diseases, demyelinating diseases clinically mainly include peripheral nervous system demyelination and central nervous system demyelination, central nervous system demyelination, common diseases such as cirrhosis, peripheral nervous system demyelination, common diseases such as Guillain-Barre syndrome.