Potassium and Trimethoprim-Sulfamethoxazole: what the published research says
PubMed indexes 8 records that name Potassium and Trimethoprim-Sulfamethoxazole together, either in the title or in an interaction, co-administration, or pharmacokinetic context. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.
Every statement below is attributed to a named, dated, linked source.
This page lists published research relevant to Potassium and Trimethoprim-Sulfamethoxazole. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.
A study appearing here is not proof that an interaction exists. Two substances can be named together in a paper that never tested them in combination, and a source listed as background may cover only one of them.
Findings are quoted from each abstract as the authors wrote them. NutriStack has not re-analysed, pooled, or reconciled them, and they may disagree with each other.
NutriStack’s own interaction assessment for this pair is not published here. It has not completed qualified-human clinical review, so it is withheld from search. See the publication gate.
Nothing here is medical advice. Decisions about prescription medication and supplements belong with your prescriber or pharmacist, who can see your full regimen.
The research
8 studies naming Potassium and Trimethoprim-Sulfamethoxazole.
Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.
International journal of clinical pharmacy · 2020 · PMID 33025449
Comparative StudyHuman subjects30 participants
“Conclusion Adherence to Dutch guidelines was poor as serum potassium monitoring was often not performed. As intravenous co-trimoxazole usage is associated with a significant increase in mean serum potassium, monitoring is strongly recommended.”
Names both Potassium and Trimethoprim-Sulfamethoxazole in its title.
British journal of clinical pharmacology · 2017 · PMID 28192629
Multicenter StudyRandomized Controlled Trial
“Co-trimoxazole significantly increases serum potassium concentration, even in participants not using antikaliuretic drugs. While the magnitude of increase was often minor, a small proportion in our outpatient cohort developed hyperkalaemia of clinical importance.”
Names both Potassium and Trimethoprim-Sulfamethoxazole in its title.
Journal of clinical pharmacy and therapeutics · 2022 · PMID 35545234
Human subjects
“This study is the first report to demonstrate the degree of changes in SCr, Na+ , and K+ concentrations after initiation of TMP-SMX treatment. If SCr is elevated after initiation of TMP-SMX treatment, clinicians should be aware of decreased Na+ and increased K+ concentrations. TMP may increase the risks of hyponatremia and hyperkalemia in a dose-dependent manner without altering GFR.”
Names both Potassium and Trimethoprim-Sulfamethoxazole in its title.
International journal of clinical pharmacy · 2020 · PMID 32390087
Human subjects30 participants
“Conclusion Adherence to Dutch guidelines was poor as serum potassium monitoring was often not performed. As intravenous co-trimoxazole usage is associated with a significant increase in mean serum potassium, monitoring is strongly recommended.”
Names both Potassium and Trimethoprim-Sulfamethoxazole in its title.
The Annals of pharmacotherapy · 1996 · PMID 8729886
Human subjects
“Therapy with standard-dose TMP/SMX is associated with a slight increase in the serum potassium concentration. Routine monitoring of the serum potassium concentration in patients who are treated with standard-dose TMP/SMX therapy is unnecessary. However, TMP/SMX should be considered as a possible cause of unexplained hyperkalemia in elderly patients receiving TMP/SMX therapy.”
Names both Potassium and Trimethoprim-Sulfamethoxazole in its title.
“Timely identification and careful monitoring of TMP-SMX-induced hyponatremia enabled the correction of sodium levels without severe complications. Thus, this report underscores the importance of vigilant monitoring and prompt identification of hyponatremia in patients undergoing TMP-SMX treatment. Further research is warranted due to limited data on the precise mechanisms of TMP-SMX-induced hyponatremia.”
Names Potassium and Trimethoprim-Sulfamethoxazole together in an interaction, co-administration, or pharmacokinetic context.
Case reports in endocrinology · 2020 · PMID 33133704
Case Reports
Names Potassium and Trimethoprim-Sulfamethoxazole together in an interaction, co-administration, or pharmacokinetic context.
Limitations
What this evidence cannot tell you.
Search-based evidence indexes have real limits, and it is worth being explicit about them:
Selection. These records were found by searching PubMed titles and abstracts for both substance names alongside interaction and pharmacokinetic terms. Relevant work that phrases things differently, or is not indexed in PubMed, will be missing.
No effect size. The quoted conclusions are the authors’ words about their own study. We have not extracted effect direction or magnitude, and a single study’s conclusion is not a consensus.
Population mismatch. Findings in healthy volunteers, animals, or a specific patient group may not transfer to you, your dose, or your formulation.
Absence is not safety. Few published studies means the combination is under-studied, which is not the same as established as safe.
Nearby evidence
Other pairs with published research.
Pages covering Potassium or Trimethoprim-Sulfamethoxazole alongside a different substance.
NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Potassium, Trimethoprim-Sulfamethoxazole, and several hundred other substances.
The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.