Drug interactions
Sodium bicarbonate + Sulphasalazine
Severity: Minor
Sodium bicarbonate and Sulphasalazine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Alkalinizing the urine alters the renal handling of salicylate, the sulfasalazine metabolite 5-aminosalicylic acid and its derivatives. The effect on systemic exposure is small at the doses of sulfasalazine used clinically.
What this interaction means in plain words
Sodium bicarbonate and Sulphasalazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Sodium bicarbonate belongs to Gastrointestinal Tract; Sulphasalazine belongs to Gastrointestinal Tract.
Why it happens
Higher urinary pH ionizes weakly acidic salicylates and reduces their tubular reabsorption, increasing renal excretion.
What to do
No routine action is needed. Be aware of the effect if large doses of bicarbonate are given over a prolonged period, and review the clinical response to sulfasalazine.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Sulphasalazine
- Deferiprone + Sulphasalazine Major
- Pexidartinib + Sulphasalazine Major
- Sepiapterin + Sulphasalazine Major
- Acalabrutinib + Sulphasalazine Moderate
- Aceclofenac + Sulphasalazine Moderate
- Acetazolamide + Sulphasalazine Moderate
Other interactions of Sodium bicarbonate
- Acetylsalicylic acid + Sodium bicarbonate Moderate
- Alendronate + Sodium bicarbonate Moderate
- Amantadine + Sodium bicarbonate Moderate
- Carbonyl iron + Sodium bicarbonate Moderate
- Cefditoren + Sodium bicarbonate Moderate
- Cefpodoxime + Sodium bicarbonate Moderate
Frequently asked questions
Can I take Sodium bicarbonate with Sulphasalazine?
MediHelp rates the interaction as minor. Sodium bicarbonate and Sulphasalazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Alkalinizing the urine alters the renal handling of salicylate, the sulfasalazine metabolite 5-aminosalicylic acid and its derivatives. The effect on systemic exposure is small at the doses of sulfasalazine used clinically.
How serious is the interaction between Sodium bicarbonate and Sulphasalazine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine action is needed. Be aware of the effect if large doses of bicarbonate are given over a prolonged period, and review the clinical response to sulfasalazine.
What other medicines interact with Sulphasalazine?
MediHelp also lists interactions of Sulphasalazine with, for example, Deferiprone, Pexidartinib, Sepiapterin. The full list is on the Sulphasalazine page.
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