• Fatigue
  • Confusion
  • Nausea or upset stomach
  • Vision changes or problems
  • Excessive sweating
  • Paleness or redness of skin
  • Nosebleeds
  • Anxiety or nervousness
  • Strong, fast or obviously irregular heartbeat (palpitations)
  • Ringing or buzzing in ears
  • Erectile dysfunction (impotence)
  • Headache
  • Dizziness