Dozens of medications can damage your hearing, ranging from common over-the-counter painkillers to powerful chemotherapy drugs. The medical term for this is ototoxicity, and the damage typically starts in the high-frequency range before progressing to frequencies used in everyday conversation. Some medications cause reversible hearing loss that clears up after you stop taking them, while others can leave you with permanent damage.
Aminoglycoside Antibiotics
Aminoglycoside antibiotics are among the most well-documented causes of drug-related hearing loss. This class includes gentamicin, tobramycin, neomycin, and streptomycin, all used to treat serious bacterial infections. These drugs enter the fluid-filled compartments of the inner ear and pass through tiny channels on the surface of hair cells, the sensory cells responsible for converting sound waves into electrical signals your brain can interpret. Once inside, the drugs generate harmful molecules that kill the hair cells. In humans, these cells do not regenerate.
The numbers are striking. Using standard hearing tests, about 20% of patients treated with aminoglycosides develop measurable hearing loss. When clinicians test higher frequencies beyond the standard range, that figure jumps to nearly 50%. One particularly dangerous feature of these drugs is that they clear slowly from inner ear fluid, much more slowly than from the bloodstream. This means hearing loss can begin or worsen even after you’ve stopped taking the medication.
Platinum-Based Chemotherapy Drugs
Cisplatin, one of the most widely used cancer drugs in the world, is also one of the most damaging to hearing. Between 40% and 80% of adults treated with cisplatin develop significant permanent hearing loss, and at least half of children do. The drug directly damages the cochlea, the spiral-shaped structure in your inner ear where sound is processed. Carboplatin, a related drug, carries a similar risk, though it tends to be somewhat less ototoxic at standard doses.
For cancer patients, this creates a painful tradeoff. The drug may be the best option for treating the disease, but the hearing loss it causes is often irreversible and can profoundly affect quality of life, especially in children who are still developing speech and language skills. Hearing monitoring before, during, and after treatment is standard practice for patients on these drugs.
Loop Diuretics
Loop diuretics like furosemide are commonly prescribed to reduce fluid buildup in people with heart failure, liver disease, or kidney disease. These drugs work by blocking a specific ion transporter in the kidneys, but the same transporter exists in the stria vascularis, a tissue in the inner ear that maintains the electrical environment hair cells need to function. When furosemide inhibits this transporter in the ear, it rapidly drops the electrical potential that drives hearing, sometimes within minutes of a high dose.
Prolonged use can cause swelling and structural damage to the stria vascularis and eventually lead to hair cell death. The hearing effects of loop diuretics are often reversible if caught early, but the real danger comes when they’re combined with other ototoxic drugs. Using furosemide alongside aminoglycosides or cisplatin dramatically increases the risk of permanent cochlear damage, far beyond what either drug would cause alone.
Aspirin and Over-the-Counter Painkillers
High-dose aspirin has long been known to cause reversible hearing loss of up to 40 decibels, depending on the dose and the individual. At around 3.9 grams per day (roughly 12 regular-strength tablets), aspirin can also make your ears more vulnerable to noise. Studies show that sound exposures normally causing about 14 decibels of temporary hearing shift produce 18 to 27 decibels of shift in people taking high-dose aspirin. Tinnitus, reduced sensitivity, and distorted sound perception from aspirin typically resolve within a few days of stopping the drug.
The more surprising finding involves regular-dose painkillers used long term. A large study found that women who took ibuprofen or acetaminophen at least twice a week had a measurably higher risk of hearing loss, with frequent use increasing the risk by up to 24%. A similar study in men found comparable results, with aspirin also contributing to risk. The mechanisms differ by drug: ibuprofen appears to reduce blood flow to the cochlea, potentially starving cells of oxygen, while acetaminophen may deplete a protective antioxidant called glutathione that shields the cochlea from damage.
Macrolide Antibiotics
Macrolide antibiotics, including azithromycin (commonly prescribed as a Z-pack) and clarithromycin, are a less obvious source of hearing trouble. A systematic review found 78 documented cases of hearing loss confirmed by audiometry across 44 studies, including cases at standard doses. The reassuring news is that in over 92% of cases, hearing returned after the drug was stopped.
Macrolide use also increases the risk of developing tinnitus by about 25%. This association is strongest in people who take higher cumulative doses (more than 14 defined daily doses) and in those using intermediate or long-acting formulations.
Erectile Dysfunction Medications
Sildenafil, tadalafil, vardenafil, and avanafil have all been linked to sudden hearing loss, usually in one ear. The FDA updated its labeling for these drugs in 2007 after early reports emerged. A review of adverse event databases found hundreds of reports: 309 reports of hearing reduction for sildenafil alone, plus 183 tinnitus reports for tadalafil. About 75% of affected patients experienced hearing loss in only one ear, while 22% reported tinnitus.
The prognosis is not encouraging. Only about 32% of patients who reported hearing problems from these drugs documented any improvement. The damage appears to be cochleotoxic, meaning it directly harms the structures of the inner ear rather than affecting the nerve. This is a rare side effect, but the hearing loss can be severe, with some documented cases showing near-total loss in the affected ear.
How Symptoms Typically Progress
Tinnitus, a ringing or buzzing sound that only you can hear, is usually the earliest warning sign. It often appears before any noticeable change in hearing ability. From there, hearing loss tends to start in the highest frequencies, sounds like birds singing, children’s voices, or consonant sounds like “s” and “th.” Because these frequencies aren’t always obvious in daily life, you might not realize anything is wrong until the damage has progressed to lower, more conversational frequencies.
Symptoms can appear quickly, sometimes within hours of taking a medication, or they can develop gradually over months or even years. With some drugs, particularly aminoglycosides, hearing loss can continue to worsen for up to five years after treatment ends. Some ototoxic drugs also affect the vestibular system, causing dizziness, balance problems, or a sense that the room is spinning.
Who Is Most at Risk
Several factors make certain people more vulnerable to drug-induced hearing loss. Kidney function is one of the most important, because many ototoxic drugs are cleared through the kidneys. When kidney function is impaired, these drugs stay in the body longer at higher concentrations, giving them more time to accumulate in the inner ear. Age plays a role at both ends of the spectrum: very young children and older adults are more susceptible. Genetic variation also matters, as some people carry gene variants that make their hair cells more vulnerable to drug-related damage.
Taking multiple ototoxic drugs at the same time is one of the biggest risk amplifiers. The combination of an aminoglycoside antibiotic with a loop diuretic, for example, is far more dangerous than either drug alone. Prior noise exposure and pre-existing hearing loss also lower the threshold at which medications can cause additional damage. If you’re starting a medication known to carry ototoxic risk, a baseline hearing test before treatment and follow-up testing at 3 and 12 months after treatment can catch changes early, when there may still be options to adjust your treatment plan.