Which of the following "dangerous drugs" can be dispensed without an established practitioner-patient relationship?

Immunizations can be dispensed without an established practitioner-patient relationship because they are often given in public health settings or pharmacies specifically for preventive care. The practice of administering vaccines is typically governed by state laws that allow pharmacists, registered nurses, and other trained health care professionals to provide immunizations. This is particularly relevant during widespread vaccination campaigns, where the goal is to enhance public health by increasing vaccination rates without necessitating a formal relationship between the patient and the health care provider.

In contrast, the other options typically require a more formal relationship. Antibiotics for general use often necessitate an assessment of the patient's condition and history to ensure appropriate treatment. Pain medications and psychotropic medications also usually require a thorough evaluation and a prescription from a healthcare provider who has an established relationship with the patient. This ensures proper monitoring and management of the patient's health and medication use, considering the potential for serious side effects and the complexities involved in treating conditions related to these medications.