Qsymia (Phentermine + Topiramate) (Phentermine and Topiramate) — Uses, Dosage, Side Effects & Safety

Drug class: Anorexiant; Anticonvulsant Combination; Weight Management Agent

Overview

Qsymia is a prescription medication used to help adults with obesity or overweight (with at least one weight-related condition such as high blood pressure, type 2 diabetes, or high cholesterol) lose weight and keep it off. It combines two active ingredients: phentermine, which suppresses appetite, and topiramate, which is thought to help with weight loss by affecting certain chemicals in the brain. Qsymia works best when used together with a reduced-calorie diet and increased physical activity. It is not a substitute for healthy lifestyle changes. Patients should be aware that Qsymia is not for everyone and should only be used under the supervision of a healthcare provider. Key points: Qsymia is not recommended during pregnancy due to the risk of birth defects. Regular follow-up with your doctor is important to monitor for side effects and effectiveness.

Therapeutic uses

  • Chronic weight management
  • Obesity
  • Weight loss in adults with a BMI of 30 kg/m² or greater
  • Weight loss in adults with a BMI of 27 kg/m² or greater with at least one weight-related comorbidity

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Common side effects

  • Dizziness
  • Insomnia
  • Constipation
  • Dry mouth
  • Paresthesia
  • Cognitive impairment
  • Increased heart rate
  • Suicidal thoughts

Frequently Asked Questions about Qsymia (Phentermine + Topiramate)

How long does it take to see results with Qsymia?

Most people begin to see weight loss within the first 12 weeks of treatment when combined with diet and exercise. If you do not lose at least 3% of your body weight after 12 weeks, your doctor may adjust your dose or discontinue the medication.

Can I take Qsymia if I am pregnant or planning to become pregnant?

No. Qsymia can cause birth defects and should not be used during pregnancy or if you are planning to become pregnant. Use effective contraception while taking Qsymia.

Is Qsymia habit-forming?

Phentermine, one of the components, is a stimulant and may have potential for abuse or dependence. Take Qsymia only as prescribed and do not share it with others.

What should I do if I experience mood changes while taking Qsymia?

Contact your healthcare provider immediately if you notice new or worsening mood changes, depression, anxiety, or suicidal thoughts.

Can I stop Qsymia suddenly?

Do not stop Qsymia suddenly, especially if you have a history of seizures. Your doctor will guide you on how to safely discontinue the medication.

Does Qsymia interact with birth control pills?

Qsymia may reduce the effectiveness of some birth control pills and increase the risk of irregular bleeding. Discuss contraception options with your healthcare provider.

Is Qsymia covered by insurance or the PBS in Australia?

Qsymia may not be covered by all insurance plans or the Pharmaceutical Benefits Scheme (PBS) in Australia. Check with your insurer or the PBS for current coverage details.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.