Stop use and see a doctor in person if...

You should stop using your medication immediately and seek help from a qualified healthcare professional if you develop:

  • Sudden loss of hearing or vision
  • Heart palpitations
  • Dizziness
  • Chest pain or shortness of breath
  • An erection lasting more than 4 hours even if it isn’t painful
  • Hives.


If it is an emergency, please call 911.

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