Final answer:
The client should be advised to avoid eating or drinking for 15 minutes before and after taking oral transmucosal fentanyl lozenges to ensure proper absorption. Chewing, crushing, or exposing the lozenge to direct sunlight should be avoided as these can alter medication effectiveness.
Step-by-step explanation:
When providing discharge teaching for a client who will continue taking oral transmucosal fentanyl lozenges, it is important to include the correct handling and administration information. The nurse should advise the client to avoid eating or drinking for 15 minutes before and after taking the medication to ensure proper absorption of the fentanyl through the oral mucosa. It's vital to instruct the client not to chew, crush, or expose the lozenge to direct sunlight, as these actions can alter the medication's effectiveness and release of the drug.