Platelet decrease, the use of dexamethasone may be a long-lasting recovery, or may be after the effect of the drug is over it will fall again, each person’s sensitivity to hormone drugs is different, so the use of the drug to take into account the patient’s sensitivity to hormones. 1. Hormone-dependent patients, the use of the drug will show obvious platelet elevation effect, once the effect of the drug will be reduced. 2. Hormone-sensitive patients, the use of the drug will also show good platelet elevation effect, there will be the possibility of sustained recovery. Dexamethasone belongs to the glucocorticoid class of drugs, the drug common adverse reactions are: infection, gastrointestinal discomfort, the emergence of neuropsychiatric abnormalities, water electrolyte disorders. There are also some contraindications to this drug, including allergy to hormone drugs is prohibited; the emergence of hypertension, thrombosis, myocardial infarction and gastroduodenal ulcer and other diseases of patients with caution. If the patient has such a situation, please consult a doctor in a timely manner, under the guidance of a professional doctor to carry out reasonable and standardized treatment. The use of drugs must follow the doctor’s instructions, not blindly use their own medication, so as not to cause adverse consequences.