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When should I call my doctor if I am taking Qsymia?

While you're taking the prescription weight-loss drug Qsymia (phentermine and topiramate), you should call your doctor right away if you have any symptoms of an allergic reaction, such as:
  • hives or itching
  • difficulty breathing
  • swelling of your face, mouth, throat or tongue
Also, call your doctor immediately if you experience any of these symptoms:
  • suicidal thoughts, depression or other mood changes
  • changes in vision
  • difficulty concentrating or remembering
  • confusion
  • problems with speech
  • loss of appetite
  • unusual weakness or fatigue
  • fast or irregular heartbeat
  • low blood sugar
  • kidney stones
  • chest pain or chest tightness
  • difficulty breathing
  • vomiting
  • a change in your period (if you take birth control pills)
In addition, you should call your doctor immediately if you become pregnant while taking Qsymia.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.