Prozac With Sudafed Interaction Question

In our latest question and answer, the pharmacist discusses the interaction between Prozac and Sudafed.

Question

Many online medical sites advise against pseudoephedrine (Sudafed) while taking Prozac. This site indicates Sudafed is OK to take with Prozac. Has the research/medical advice changed?

Asked by Teacher On Dec 13, 2022

Answered by
Medical Content Reviewed By HelloPharmacist Staff

Published Dec 13, 2022
Last updated Apr 29, 2024

Key points

  • Sudafed (pseudoephedrine) has no known interaction with Prozac (fluoxetine).
  • There are several different products in the Sudafed brand family, such as 'SUDAFED PE® Head Congestion + Flu Severe' and 'SUDAFED® Sinus 12-Hour Pressure + Pain'. Sudafed products that contain more than pseudoephedrine, such as ones that contain dextromethorphan, can interact with Prozac and need to be used cautiously.

Answer

Thanks so much for reaching out! You are correct that I have written before that Sudafed (pseudoephedrine) is not known to interact with Prozac (fluoxetine), and both drugs are generally considered safe to take together. The lack of interaction is consistent with what is reported in medical literature and the known mechanisms of both drugs.

I'm curious about where you are finding conflicting information. After reading your question, I did a quick search myself of some of the more popular, publicly accessible drug information websites, and I am seeing no interaction reported on them either.

If you are able to write back and give some sources or references as to where you are finding interaction details, please do so and I can respond accordingly.

Prozac Does Interact With Other Products In The Sudafed Family Of Products 

When I say that Sudafed doesn't interact with Prozac, I am referring to the 'original' Sudafed product, that only contains the decongestant pseudoephedrine.

My assumption based on your question is that you are perhaps looking up Sudafed products that contain additional ingredients to the decongestant Sudafed.

It is important to remember that Sudafed is a brand name, and there are multiple products that carry the Sudafed name. There certainly are some Sudafed brand products that do interact with Prozac and need to be used cautiously.

For example, the Sudafed product 'SUDAFED PE® Head Congestion + Flu Severe' contains the cough suppressant dextromethorphan.

Prozac does interact with dextromethorphan (the combination increases the risk of a rare, but serious condition known as serotonin syndrome), and they need to be used cautiously together. 

Another example of a product Prozac interacts with is 'SUDAFED® Sinus 12 Hour Pressure + Pain'. This product contains naproxen, an NSAID similar to ibuprofen. All NSAIDs needs need to be used cautiously with Prozac due to the increased risk of bleeding problems.

Final Words

It is important to always look at the full ingredient list of the products you are looking to take, and if any questions come up, be sure to ask your doctor or pharmacist.

I wanted to thank you again for your great question. Reach back out anytime.

References

About the Pharmacist

Dr. Brian Staiger, PharmD

Dr. Brian has been practicing pharmacy for over 13 years and has wide-ranging experiences in many different areas of the profession. From retail, clinical, program development, and administrative responsibilities, he's your knowledgeable and go-to source for all your pharmacy and medication-related questions! Dr. Brian Staiger also has herbalist training and educational certificates in the field of medical ethnobotany. Feel free to send him an email at [email protected]! You can also connect with Dr. Brian Staiger on LinkedIn.

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