Herb & supplement monograph

Sodium Bicarbonate Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Sodium Bicarbonate interacts with medications. The heart of this page is the interaction list — every drug Sodium Bicarbonate is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Sodium Bicarbonate is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

Check Sodium Bicarbonate against your medication

Add one medication

✓ Supplement

Sodium Bicarbonate

1 Your medication

Start typing any prescription or over-the-counter drug name.

Reviewed by licensed pharmacists Sourced from Natural Medicines

On this page

Sodium Bicarbonate Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Sodium Bicarbonate drug interaction is moderate for most people: none of the listed interactions is rated major, but several are well documented in humans. Every interaction in the profile is rated moderate, and the best-supported ones involve real changes in how the body absorbs or clears certain medicines.

Interactions deserving the most attention

The strongest human evidence involves aspirin, pseudoephedrine, and chlorpropamide, an older diabetes medication. By making the urine less acidic, sodium bicarbonate can speed the removal of aspirin and chlorpropamide, which may weaken pain relief or blood sugar control, while it slows the removal of pseudoephedrine, raising the chance of side effects. It can also lower stomach acid, which may reduce absorption of the antibiotic cefpodoxime.

What the rest of the list means

Most of the other listed combinations, including diuretics, corticosteroids, and certain antibiotics, reflect a theoretical risk of low potassium that has mainly been linked to very large daily amounts of baking soda, not typical use. Sodium bicarbonate also adds sodium, which can add up over time when combined with sodium-containing medicines.

Check your medications against Sodium Bicarbonate

Based on HelloPharmacist’s Sodium Bicarbonate interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Sodium Bicarbonate

257 medications have a known interaction with Sodium Bicarbonate, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Sodium Bicarbonate using our pharmacist-reviewed interaction data.

AI summaries are generated from our Sodium Bicarbonate interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction 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.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Sodium Bicarbonate combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Sodium Bicarbonate affects

Every type of medication (drug category) Sodium Bicarbonate is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 14 drug categories Sodium Bicarbonate interacts with

Aminoglycoside AntibioticsAmphotericin-b (abelcet, Others)AspirinBeta-adrenergic AgonistsCefpodoxime Proxetil (vantin)Chlorpropamide (diabinese)Cisplatin (platinol-aq)CorticosteroidsLoop DiureticsMethylxanthinesPseudoephedrine (sudafed)Sodium-containing DrugsStimulant LaxativesThiazide Diuretics

Aminoglycoside Antibiotics

Theoretically, sodium bicarbonate may increase the risk for hypokalemia in patients receiving aminoglycosides.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, when administered intravenously, the most common complication of sodium bicarbonate is hypokalemia. Nephrotoxicity caused by aminoglycosides may lead to increased urinary losses of various electrolytes, including potassium.

Likelihood Possible Evidence D

Amphotericin-B (Abelcet, Others)

Theoretically, sodium bicarbonate may increase the risk for hypokalemia in patients receiving amphotericin B.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, when administered intravenously, the most common complication of sodium bicarbonate is hypokalemia. Amphotericin B increases urinary potassium losses due to toxic effects on renal tubular epithelium. Hypokalemia can occur in up to 50% of patients.

Likelihood Possible Evidence D

Aspirin

Theoretically, sodium bicarbonate may reduce the levels and clinical effects of aspirin.
In humans, oral or intravenous administration of sodium bicarbonate increases salicylate elimination. Although the exact mechanism of this effect is not clear, some researchers hypothesize that sodium bicarbonate increases urinary pH, which increases salicylate ionization and subsequent excretion by the kidneys. In patients with urine pH of about 5.5, renal clearance of salicylate is approximately 55 mL/min. When urine pH is increased with oral sodium bicarbonate to about 7.5, renal clearance of salicylate increases to approximately 100 mL/min. Similarly, urine alkalinization with sodium bicarbonate increases the mean total body clearance of salicylate by approximately 60% compared with urine acidification.

Likelihood Probable Evidence B

Beta-Adrenergic Agonists

Theoretically, sodium bicarbonate may increase the risk for hypokalemia in patients taking beta-adrenergic agonists.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common adverse effect of intravenous sodium bicarbonate is hypokalemia. Oral, parenteral, or inhaled beta-adrenergic agonists can reduce serum potassium levels, especially during acute use of high doses.

Likelihood Possible Evidence D

Cefpodoxime Proxetil (Vantin)

Theoretically, sodium bicarbonate might reduce the levels and clinical effects of cefpodoxime.
Cefpodoxime proxetil is an oral prodrug that is de-esterified in the intestine to the active drug cefpodoxime. Drugs or supplements that increase gastric pH can inhibit the activation of cefpodoxime proxetil and reduce the peak plasma concentrations of cefpodoxime. In humans, taking sodium bicarbonate 12.6 grams orally along with cefpodoxime proxetil 200 mg reduces peak plasma concentrations and area under the plasma concentration-time curve (AUC) of cefpodoxime by 35% to 50%.

Likelihood Probable Evidence B

Chlorpropamide (Diabinese)

Theoretically, sodium bicarbonate might reduce the levels and clinical effects of chlorpropamide.
The elimination of chlorpropamide by the kidneys depends strongly on urine pH. At a pH of 5, the renal clearance of chlorpropamide ranges from 0.5 to 3 mL/hr. At a pH of 8, renal clearance of chlorpropamide ranges from 500 to 1000 mL/hr. When taken in combination with oral sodium bicarbonate, the elimination half-life of chlorpropamide is shortened from 49.7 to 12.8 hours and urinary excretion of chlorpropamide is increased four-fold.

Likelihood Probable Evidence B

Cisplatin (Platinol-Aq)

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients receiving cisplatin.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common complication of intravenous sodium bicarbonate is hypokalemia. Cisplatin can cause renal tubular damage, with increased losses of electrolytes including potassium.

Likelihood Possible Evidence D

Corticosteroids

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients taking corticosteroids.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common intravenous complication of sodium bicarbonate is hypokalemia. Some glucocorticoids (corticosteroids) can also cause hypokalemia by causing sodium retention, resulting in compensatory renal potassium excretion. It is most common with hydrocortisone, cortisone, and fludrocortisone, followed by prednisone and prednisolone.

Likelihood Possible Evidence D

Loop Diuretics

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients taking loop diuretics.
Loop diuretics increase urinary potassium excretion. Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common complication of intravenous sodium bicarbonate is hypokalemia.

Likelihood Possible Evidence D

Methylxanthines

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients taking methylxanthines.
Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common complication of intravenous sodium bicarbonate is hypokalemia. Theophylline and related drugs can reduce serum potassium levels, possibly by increasing intracellular uptake of potassium. Hypokalemia is most likely to occur after acute overdose of these drugs. However, reduced potassium levels can occur with therapeutic doses, and the incidence and degree of hypokalemia increases with increasing serum theophylline levels.

Likelihood Possible Evidence D

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.

Likelihood Probable Evidence B

Sodium-Containing Drugs

Concomitant use of sodium-containing drugs with additional sodium from dietary or supplemental sources may increase the risk of hypernatremia and long-term sodium-related adverse effects.
The Chronic Disease Risk Reduction (CDRR) intake level of 2.3 grams of sodium daily indicates the intake at which it is believed that chronic disease risk increases for the apparently healthy population. Some medications contain high quantities of sodium. When used in conjunction with sodium bicarbonate, the CDRR may be exceeded. Additionally, concomitant use may increase the risk for hypernatremia; this risk is highest in the elderly and people with other risk factors for electrolyte disturbances.

Likelihood Possible Evidence D

Stimulant Laxatives

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients taking stimulant laxatives.
Long-term use of stimulant laxatives, or acute use of high doses (e.g., in bowel-cleansing regimens), can result in potassium loss and hypokalemia. Orally, use of excessive sodium bicarbonate (such as intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common complication of intravenous sodium bicarbonate is hypokalemia.

Likelihood Possible Evidence D

Thiazide Diuretics

Theoretically, sodium bicarbonate may increase the risk of hypokalemia in patients taking thiazide diuretics.
Thiazide diuretics increase urinary potassium excretion. Orally, use of excessive sodium bicarbonate (such as the intake of "tablespoons" of sodium bicarbonate daily or up to one box of baking soda weekly) has been associated with cases of hypokalemia. Furthermore, the most common complication of intravenous sodium bicarbonate is hypokalemia.

Likelihood Possible Evidence D

Monograph

Sodium Bicarbonate: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Sodium bicarbonate (baking soda) is a simple compound most often used as a fast-acting antacid and, in sports, as a buffer that may help with short, high-intensity exercise. It is generally safe in small, occasional doses, but it is high in sodium and can cause serious problems if overused, so people with heart, kidney, or blood pressure issues should be careful and check with a pharmacist or doctor.

Part used: Not applicable (a manufactured chemical compound, NaHCO3)
Common forms: Powder (baking soda), tablets, effervescent powders, oral solution, and intravenous solution (medical use)

People commonly use it for

Heartburn and indigestion (antacid)
Athletic performance (exercise buffer)
Urine alkalinization
Soothing skin irritation or itching (topical baths)
Mouth rinse and oral care

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally safe in small, occasional amounts but high in sodium and risky if overused or used long-term.

PregnancyPossibly Unsafe

When used orally or intravenously during pregnancy. There is concern that sodium bicarbonate may increase the risk of metabolic alkalosis or fluid ret...

Read the full pregnancy detail

BreastfeedingPossibly Unsafe

When used orally or intravenously during pregnancy. There is concern that sodium bicarbonate may increase the risk of metabolic alkalosis or fluid ret...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Sodium bicarbonate is a white, crystalline powder better known as baking soda. Its chemical formula is NaHCO3. Unlike most products on this site, it is not an herb or a plant extract — it is a simple chemical compound that is manufactured or mined from natural mineral deposits.

People use it in many ways. In the kitchen it is a leavening agent. In the medicine cabinet it is most often used as an antacid to relieve heartburn and an upset stomach. It is also used in toothpastes and mouth rinses, in soothing baths for itchy skin, and by some athletes who believe it can improve performance during short, intense exercise. In hospitals, a sterile form is given by vein to treat certain serious conditions, but that is a different medical use than over-the-counter products.

How it works

Sodium bicarbonate is a base, which means it neutralizes acids. When it reaches the stomach, it reacts with stomach acid and turns it into water, salt, and carbon dioxide gas. This raises the pH (makes it less acidic) and relieves the burning feeling of heartburn. The carbon dioxide gas is what often causes burping.

In the bloodstream, bicarbonate is part of the body's natural system for keeping blood at a healthy acid-base balance. The idea behind using it for exercise is that extra bicarbonate may help "mop up" the acid (hydrogen ions) that builds up in hard-working muscles, delaying fatigue. This buffering effect is well understood in chemistry, but how much it actually helps real-world performance is still debated.

Effectiveness

Does Sodium Bicarbonate work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 33 uses evaluated

3 Possibly effective 2 Leans ineffective 28 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

Possibly Effective Athletic performance