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Qsymia Patient Information including If I Miss a Dose
In this Article
- What is phentermine and topiramate (Qsymia)?
- What are the possible side effects of phentermine and topiramate (Qsymia)?
- What is the most important information I should know about phentermine and topiramate (Qsymia)?
- What should I discuss with my healthcare provider before taking phentermine and topiramate (Qsymia)?
- How should I take phentermine and topiramate (Qsymia)?
- What happens if I miss a dose (Qsymia)?
- What happens if I overdose (Qsymia)?
- What should I avoid while taking phentermine and topiramate (Qsymia)?
- What other drugs will affect phentermine and topiramate (Qsymia)?
- Where can I get more information?
What happens if I miss a dose (Qsymia)?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose (Qsymia)?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of phentermine and topiramate can be fatal.
Overdose symptoms may include confusion, hallucinations, panic, feeling hostile or aggressive, nausea, vomiting, diarrhea, stomach cramps, irregular heartbeat, rapid breathing, overactive reflexes, or seizure (convulsions).
What should I avoid while taking phentermine and topiramate (Qsymia)?
Do not take any other prescription or over-the-counter weight-loss products without your doctor's advice.
Drinking alcohol can increase certain side effects of phentermine and topiramate.
This medication may cause blurred vision and may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.
What other drugs will affect phentermine and topiramate (Qsymia)?
Before using phentermine and topiramate, tell your doctor if you regularly use other medicines that make you sleepy (such as cold or allergy medicine, sedatives, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for depression or anxiety). They can add to sleepiness and other side effects caused by phentermine and topiramate.
Tell your doctor about all other medicines you use, especially:
- digoxin (Lanoxin, Lanoxicaps);
- lithium (Eskalith, LithoBid);
- a diuretic (water pill);
- glaucoma medications such as acetazolamide (Diamox) or methazolamide (Glauctabs, MZM, Neptazane);
- insulin or oral diabetes medication; or
- seizure medication such as carbamazepine (Carbatrol, Equetro, Tegretol), divalproex sodium (Depakote), lamotrigine (Lamictal), phenytoin (Dilantin), valproic acid (Depakene, Stavzor), or zonisamide (Zonegran).
This list is not complete and other drugs may interact with phentermine and topiramate. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.
Where can I get more information?
Your pharmacist can provide more information about phentermine and topiramate.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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Additional Qsymia Information
- Qsymia Drug Interactions Center: phentermine-topiramate oral
- Qsymia Side Effects Center
- Qsymia FDA Approved Prescribing Information including Dosage
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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