Alzheimer's disease (AD) is a neurodegenerativedisease. Ovariectomized (OVX) AD rat model has been widely used in the experimental research recently. This article reviewed the method of OVX model establishment, behaviorchange, histopathology and biochemistry. Articles published in recent 20 years were collected in the review of the development.

Objective To retrospectively analyse the use of TCM injections in Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University from 2019 to 2023;To evaluate the reasonableness of its clinical use of medication;To provide theoretical guidance for clinical work in the new situation.Methods Relevant data on the use of TCM injections in a hospital from 2019 to 2023 were collected,and the research method of retrospective analysis was used to analyse their use and medication law.Results From 2019 to 2023,the overall amount of use of TCM injections and the ratio of the amount of use of Western patent medicines showed a downward trend year by year;the amount of anti-neoplastic drugs TCM injections ranked in the first place although it decreased year by year,and the amount of use of enucleating agents and oncological auxiliary drugs TCM injections showed a downward trend;the changes in the consumption of TCM injections,the defined daily doses,and the defined daily cost fluctuated greatly,which was relevant to the medical insurance policy and the inclusion of the nationally negotiated medicines;both the infection of COVID-19 and medical policy played a great influence on the application of TCM injections.Conclusion The use of TCM injections is subject to changes in policy and the influence of social environment,and the supervision of the use of TCM injections should be strengthened to ensure the rational use of medication and medication safety for patients.