The most common side effects associated with asthma medications include:

• High blood pressure
• Skin rash, itchiness or hives
• Mouth and throat irritation
• Rapid heartbeat
• Heart palpitations (an awareness of a strong, fast, irregular or "galloping" heartbeat)
• Stomach ulcer
• Heartburn, upset stomach or loss of appetite
• Headache
• Nervousness or restlessness
• Irritability
• Insomnia
• Dizziness
• Loose bowel movements
• Abdominal pain
• Coughing
• Bad taste in the mouth
• Sneezing
• Wheezing
• Nausea
• Vomiting
• Fluid retention
• Earache
• Dry mouth
• Respiratory infections
• Thinning of the skin which can lead to easy bruising
• Chest tightness
• Difficulty breathing
• Tremors
• Muscle twitching
• Swollen hands or face
• Obesity
• Blurred vision

Other potential side effects include:

• Oral yeast infection (thrush)
  
  
• Decreased growth in children
  
  
• Seizures
  
  
• Severe weakness or confusion
  
  
• A stinging sensation in the nose or nosebleeds
  
  
• Increased risk of infection from chickenpox or measles
  
  
• Increased risk of osteoporosis (a disorder in which the bones lose mass and density)
  
  
• Increased risk of glaucoma (a group of eye diseases that affect the optic nerve, which connects the eye to the brain) or cataracts (a clouding of the eye's lens) if used long–term