What type of drug must a pharmacist dispense according to a proper order from a practitioner?

The correct selection focuses on dangerous drugs, which are substances that are regulated due to their potential for abuse or harm and require a valid prescription from a licensed practitioner for dispensing. These drugs are defined and categorized under specific state and federal regulations to ensure they are used safely and effectively in clinical settings.

Pharmacists play a vital role in ensuring that dangerous drugs are dispensed appropriately, following the orders provided by healthcare practitioners. This includes verifying the prescription, ensuring the patient's safety, and providing necessary information about the drug.

While over-the-counter drugs can be sold directly to consumers without a prescription, they do not fall under the same regulatory requirements. Nutrition supplements and herbal medications also generally do not require a prescription and are not classified as dangerous drugs. Thus, the primary responsibility of pharmacists revolves around the careful dispensing of dangerous drugs that necessitate a practitioner's order for safety and compliance reasons.