There is no definite time of effect for taking Olracetam, which is related to the patient’s own condition. Olracetam is a kind of brain protective agent, in the clinic mainly treats the symptoms of neurological deficits, memory and mental retardation caused by brain injury. For Alzheimer’s disease, mild to moderate vascular dementia also has a certain therapeutic effect. Olracetam is mainly used for cognitive impairment, and most of the cognitive impairment is a gradual progression process, Olracetam can slow down its progress, but can not stop, so there is no clear clinical application of Olracetam after the time of effect. For mild cases of memory loss caused by traumatic brain injury, the effect can be seen in 1~2 weeks, for Alzheimer’s patients, how long to use, and may not have a clear effect. Adverse reactions to the use of olaxetan are relatively rare, but some patients may experience mental arousal and sleep abnormalities after taking olaxetan. Patients who are allergic to Olracetam should be prohibited from using it, and patients with renal insufficiency should be prohibited from using it. If there is a need for medication, it is recommended to use the drug under the guidance of a doctor, and remember not to take it privately.