A 37-year-old female asked:
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what were the prescription or over-the-counter drug interactions seen in the qsymia (phentermine and topiramate) study? anything people really have to watch out for?

1 doctor answer
Dr. Bac Nguyen
22 years experience Family Medicine
Few to consider..: Qsymia=phentermine+topiramate: causes many side effects. Rare but serious ones: allergic reaction, high blood pressure, heart valve disorders, tremors, psychosis, pancreatitis, liver failures, thus careful with decongestant (pseudafed/phenylephrine), antihistamines 9zyrtec/benadryl), and tylenol (acetaminophen) containing products. Consult doc if u need to take these meds. Good luck.
Answered on Sep 24, 2018
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