A client with tuberculosis returns to the clinic for daily antibiotic injections for a urinary infection. The client has been taking antitubercular medications for 10 weeks and reports ringing in the ears. Which prescribed medication should the practical nurse (PN) report to the healthcare provider?

A. Isoniazid can cause side effects like peripheral neuropathy, but ringing in the ears is not a common symptom of this medication. B. Gentamicin can cause ototoxicity, which includes symptoms such as ringing in the ears (tinnitus). This side effect is significant and should be reported to the healthcare provider for further evaluation. C. Pyridoxine is used to prevent neuropathy caused by isoniazid and does not cause ringing in the ears. D. Rifampin is an antitubercular medication but is not commonly associated with tinnitus as a side effect. The immediate concern with ringing in the ears is related to gentamicin.