Final answer:
A hospital pharmacist must review the practitioner's medical order before dispensing medication unless there is an emergency, ensuring drug safety and efficacy through their expertise in chemistry and biology.
Step-by-step explanation:
A pharmacist in a hospital must review the practitioner's medical order before dispensing medication except in cases of emergency. Pharmacists play a critical role in ensuring the safe and effective use of medications by reviewing prescriptions for accuracy, verifying the proper medication is given at the correct dosage, and checking for potential drug interactions. They bring a high level of expertise in chemistry and biology to understand the implications drugs have on the human body. Moreover, pharmacists can provide valuable insights into drug selection, dosage, interactions, and side effects, which they communicate to both physicians and patients to optimize care.