Which of the following is considered unprofessional conduct when advertising?

Offering bonuses to customers is considered unprofessional conduct when advertising in the context of pharmacy practice. This is primarily because it can create a perception that the pharmacy is incentivizing purchases in ways that may compromise the professional nature of the pharmacy. Bonuses can imply a transactional approach to pharmaceutical care, undermining the trust that patients place in healthcare providers. An admissible practice in pharmacy is to ensure that marketing strategies adhere to professional ethics and standards, which emphasize patient care over profit motives.

The other options, while they may raise certain considerations in practice, do not inherently violate the standards of professionalism in the same manner. For example, discussing pricing in detail can help patients make informed decisions about their medications. Using verified testimonials can serve to enhance transparency and trust in pharmacy services, provided they are truthful and not misleading. Separating RX advertising from OTC advertisements reflects a clear communication strategy that informs patients adequately about the different categories of medications, promoting responsible medication use.