Decreased Blood Pressure

• The active ingredient in Rogaine dilates the blood vessels, which can cause your blood pressure to unexpectedly decrease within 30 minutes of using the solution.
  
  

Eye Irritation

• If the Rogaine solution gets into or around your eyes, you may have irritation or burning that can be relived by flushing your eyes with water.
  
  

Scalp Irritation

• Rogaine may cause side effects such as burning, irritation and itching on the scalp where the solution was applied.
  
  

Excessive Hair Growth

• Excessive hair growth is a side effect of Rogaine that may occur in areas where you do not want more hair, such as the back or chest.
  
  

Dizziness

• Dizziness, fainting or sudden development of a rapid heartbeat are serious side effects of Rogaine that require prompt medical treatment.
  
  

Weight Gain

• Swelling in the hands and feet and unexplained weight gain are side effects of Rogaine that are not common and should be evaluated by a physician.
  
  

Allergic Reaction

• Rogaine may cause symptoms of an allergic reaction, such as an itchy rash, hives and shortness of breath. It may cause swelling of the face and tongue, which can be life-threatening emergencies.