Which of the following increases a client’s likelihood of understanding medication instructions?

Offering written materials in the client’s preferred language significantly enhances their likelihood of understanding medication instructions. This approach recognizes that individuals may have varying levels of literacy and comprehension of medical terminology, which can be further complicated by language barriers. By providing materials in the client's preferred language, you ensure that they not only receive the information but also can process it effectively within the context of their own linguistic familiarity.

This strategy supports informed decision-making and adherence to medication regimens because clients are more likely to comprehend the instructions and ask relevant questions when they understand the material fully. In contrast, relying solely on verbal instructions, reading aloud without visual aids, or assuming familiarity with medical jargon does not address the diverse needs of clients, which can lead to misunderstandings and potentially harmful consequences in their treatment.