Final answer:
Patients receiving tetracycline may have concerns related to side effects and interactions, including permanent discoloration of teeth, reduced absorption with dairy products, and decreased effectiveness of warfarin.
Step-by-step explanation:
Patients receiving tetracycline may have concerns related to its potential side effects and interactions. One concern is that tetracycline should not be administered to anyone older than age 65 years, as it can lead to permanent discoloration of developing teeth. Another concern is that tetracycline should not be administered with dairy products, as it can reduce the absorption of the medication. Additionally, tetracycline used with warfarin can decrease the effectiveness of warfarin and enhance clot formation.