Sodium Bicarbonate - Acetaminophen, Doxylamine, Pseudoephedrine Interaction
Herbal: Sodium Bicarbonate
Drug: Acetaminophen, Doxylamine, Pseudoephedrine
Brand names:
Ex Strength Tylenol Sinus Nighttime

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Acetaminophen, Doxylamine, Pseudoephedrine is classified as belonging to the following category: Pseudoephedrine (Sudafed)
Theoretically, sodium bicarbonate may increase levels and adverse effects of pseudoephedrine.
In humans, intravenous or oral administration of sodium bicarbonate can increase urinary pH. Clinical evidence shows that urine alkalinization increases the serum elimination half-life of pseudoephedrine by approximately 10-fold. In one patient with persistently alkaline urine, treatment with pseudoephedrine resulted in hallucinations and personality changes.
Interaction Rating
Likelihood of Occurrence
ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
References
- Brater DC, Kaojarern S, Benet LZ, et al. Renal excretion of pseudoephedrine. Clin Pharmacol Ther 1980;28(5):690-4.
Sodium Bicarbonate - More Interactions
Sodium Bicarbonate interacts with 257 drugs
Interaction Rating Key
These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.
Major | The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur. |
Moderate | Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur. |
Minor | Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction. |
Unknown | No interactions have been reported or no interaction data is currently available. |
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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Drug descriptions are provided by MedlinePlus.