Final answer:
The nurse should report tinnitus as an adverse effect of the gentamicin IV, as it is associated with ototoxicity, which is a well-known side effect of this antibiotic.
Step-by-step explanation:
The nurse should report tinnitus to the provider as an adverse effect of gentamicin IV. Gentamicin is an antibiotic used to treat various types of bacterial infections, and it is known to have several potential side effects, including ototoxicity which can manifest as tinnitus or hearing impairment. Increased appetite, improved color vision, and enhanced taste perception are not typically associated with gentamicin therapy and thus would not be considered adverse effects requiring immediate attention from the provider.