Patients should consult their physicians before taking any additional prescriptions, over-the-counter medications, nutritional supplements or herbal medications. Of particular concern to individuals taking bronchodilators are:

• Antihypertensives (medications to treat high blood pressure). Bronchodilator use may lessen the effectiveness of these drugs.
  
  
• Anti-arrhythmics (medications to treat abnormal heart beats). Bronchodilators used in conjunction with these drugs may lessen their effectiveness.
  
  
• Antibiotics (medications to treat bacterial infection). These medications may interfere with the function of bronchodilators.
  
  
• Antiseizure medications. Bronchodilator use may lessen the effectiveness of these drugs.
  
  
• Ulcer medications. These medications may interfere with the function of bronchodilators.
  
  
• Psychiatric medications. Use of some bronchodilators in conjunction with certain medications used to treat psychiatric disorders may lead to a potentially dangerous drop in blood pressure and/or rapid heartbeat.
  
  
• Smoke. Smoking or exposure to second-hand smoke can interfere with the way the body responds to certain bronchodilators.
  
  
• Caffeine. Coffee, tea, colas and other caffeinated drinks can change the effectiveness of certain bronchodilators.