Yes, some chemotherapy drugs can affect hearing, a side effect called ototoxicity. It doesn't happen to everyone, and it shouldn't scare anyone away from treatment that may save their life. But knowing about it matters, because monitoring can catch changes early and give you and your oncology team options.
Which treatments carry the risk
The best-known culprits are platinum-based chemotherapy drugs, cisplatin especially, and to a lesser degree carboplatin. These medications can damage the hair cells of the inner ear, typically starting with high frequencies. Risk varies with dose, duration, age and other medications. Certain other drugs used alongside cancer care, some powerful antibiotics and loop diuretics, can add to the effect, as can radiation involving the head or ear area.
Ototoxic hearing loss is usually sensorineural and often permanent, which is exactly why early detection matters.
Signs to watch for during and after treatment
- New or worsening ringing in the ears, tinnitus is often the first signal
- Trouble following speech, especially in noise
- Sounds seeming muffled, or high-pitched sounds (birds, timers, s-sounds) fading
- Fullness in the ears or new dizziness
Report any of these to your oncology team promptly. In some cases, dosing or drug choices can be adjusted; that's a medical decision made with full information, and hearing data is part of that information.
Why baseline and follow-up testing helps
The ideal pattern is a hearing test before treatment begins, then periodic checks during and after. Because ototoxicity starts in frequencies above everyday speech, testing detects it before you'd ever notice, while there's still time to discuss options.
If hearing loss remains after treatment
You've been through enough without also missing conversations. Modern hearing aids handle high-frequency loss, the typical ototoxic pattern, very well, and tinnitus management can quiet the ringing many survivors carry. Whether you're preparing for treatment, mid-course, or years past it, we're glad to help with testing, monitoring and care.