Could Your Medication Be Affecting Your Voice?
Some medications including prescription, over-the-counter, and herbal supplements can affect the function of your voice. If your doctor prescribes a medication that adversely affects your voice, make sure the benefit of taking the medicine outweighs the problems with your voice. Learn more about the effects of medications on the voice.
Effects of Medications on the Voice
Most medications affect the voice by drying out the protective mucosal layer covering the vocal cords. Vocal cords must be well-lubricated to operate properly; if the mucosa becomes dry, speech will be more difficult. This is why hydration is an important component of vocal health.
Effects of medications on the voice also include thinning blood in the body, which makes bruising or hemorrhaging of the vocal cord more likely if trauma occurs, and by causing fluid retention (edema), which enlarges the vocal cords. Medications from the following groups can adversely affect the voice:
- Antidepressants
- Muscle relaxants
- Diuretics
- Antihypertensives (blood pressure medication)
- Antihistamines (allergy medications)
- Anticholinergics (asthma medications)
- High-dose Vitamin C (greater than five grams per day)
- Other medications and associated conditions that may affect the voice include:
- Angiotensin-converting-enzyme (ACE) inhibitors (blood pressure medication) may induce a cough or excessive throat clearing in as many as 10 percent of patients. Coughing or excessive throat clearing can contribute to vocal cord lesions.
- Oral contraceptives may cause fluid retention (edema) in the vocal cords because they contain estrogen.
- Estrogen replacement therapy post-menopause may have a variable effect.
- An inadequate level of thyroid replacement medication in patients with hypothyroidism.
- Anticoagulants (blood thinners) may increase chances of vocal cord hemorrhage or polyp formation in response to trauma.
- Herbal medications are not harmless and should be taken with caution. Many have unknown side effects that include voice disturbance.
NOTE: Contents of this fact sheet are based on information provided by The Center for Voice at Northwestern University.
Frequently Asked Questions
Many medications affect the voice primarily by drying out the protective mucosal layer on the vocal cords, which is essential for smooth vocal function. Without adequate lubrication, speaking becomes more difficult, and voice quality may deteriorate. Maintaining proper hydration helps support vocal health when taking such medications.
Medications that can negatively impact the voice include antidepressants, muscle relaxants, diuretics, antihypertensives, antihistamines, anticholinergics, and high-dose Vitamin C. These drugs can cause dryness, fluid retention, or increased risk of vocal cord injury, all of which impair vocal quality.
Angiotensin-converting-enzyme (ACE) inhibitors, commonly used for blood pressure, may cause coughing or excessive throat clearing in up to 10% of patients. This repeated irritation can lead to vocal cord lesions, negatively affecting voice quality and comfort.
Yes, oral contraceptives contain estrogen, which can cause fluid retention or edema in the vocal cords. This swelling may alter voice quality and contribute to vocal strain or discomfort during speaking or singing.
Anticoagulant medications increase the likelihood of vocal cord hemorrhage or polyp formation if trauma occurs. This means the vocal cords are more susceptible to bleeding or injury, which can lead to voice changes or damage.
Herbal medications are not always safe for vocal health because many have unknown side effects, including voice disturbances. It is important to use these supplements cautiously and discuss their use with a healthcare provider to avoid potential vocal issues.
Hydration helps maintain the mucosal layer covering the vocal cords, keeping them lubricated and functional. Since many medications cause dryness, drinking enough water supports vocal cord health and helps prevent voice difficulties.
