Anatomy of the Condition:
It may be surprising to learn that many common medications can have a negative effect on voice quality for a singer or voice professional.  In addition, the moderate social use of drugs such as alcohol can also have an impact. While all medications or drugs have some effect on the larynx, many of the effects are negligible.  However, for a person who earns their income with their voice, it is crucial to understand the potential effects of some seemingly benign medications.

Contributing Factors/ Symptoms:
The following medications or over-the-counter drugs may have a negative impact on the quality of the voice:

• Antibiotics:  Can cause throat dryness, an allergic reaction or ancillary side effects that may hamper performance, (such as a yeast infection).
• Antihistamines:  While used to dry the viscous mucous secretions from a cold, flu or allergy, antihistamines may create an extreme state of dryness in the respiratory tract that can be as detrimental to the voice as the original condition. In addition, the lack of hydration may cause a dry cough which harms the voice further.
• Antiviral Medications:  These include common medications used to fight viruses such as herpes or the flu.  While these conditions may also be harmful to the voice, antiviral medications may sometimes cause extreme dryness of the throat and voice
• Hormone Medications and Birth Control Pill:  In some instances, these medications may cause changes in the tone or quality of the voice.  Some hormones, such as birth control pills, may create a coarseness of deepening of the voice.  While these drugs have been improved in recent years and the incidence of effects on the voice have been diminished, it may be worthwhile to consult with your otolaryngologist before beginning a hormone regimen.
• Sleeping pills, anti-depressants and stimulants of any kind have a variety of side effects which can ultimately impact the voice. 

Professional singers or voice professionals should consult with their otolaryngologist to better understand the impact that new medications may have on their voice.