A week. Generally, you will be instructed to work in the hospital pharmacy for a week, so that you can know all kinds of drugs sold in the pharmacy by heart and know the usage, dosage and contraindications of various drugs. Hospital pharmacy department is a comprehensive department integrating management, technology, operation and service. Pharmacy should not only ensure accurate and qualified drugs for patients, but also ensure patients to use drugs safely and effectively, and ensure that medical expenses are more economical and reasonable.