Can I Take Naproxen While Taking Phentermine?


Asked by Lisa A.

Can I Take Naproxen While Taking Phentermine?

I have been taking Naproxen and Phentermine for the past 3 days. Days 1 and 2 seemed fine, however yesterday 3, I believe I had a bad interaction. Symptoms included severe restlessness while trying to sleep and multiple dizzy episodes upon standing.


The Drug Interactions checker at does not find any known negative interactions between these two drugs but they are careful to point out that they might have missed something.

Perhaps this is just a reaction to Phentermine? Common side effects for that drug include nervousness, overstimulation, restlessness, sleeplessness and it can also cause dizziness. Did you start taking the Phentermine 3 days ago as well?

You should know: The answer above provides general health information that is not intended to replace medical advice or treatment recommendations from a qualified healthcare professional.