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Effervescent potassium replacement Pregnancy: §4.6: No clinical problems have been encountered during pregnancy and lactation. Nevertheless, the benefit of treatment should be considered in relation to the risks before this medicinal product is given to pregnant or nursing women.

Potassium chloride with potassium bicarbonate

This effervescent oral combination supplies potassium chloride together with potassium bicarbonate to correct hypokalaemia, providing potassium with both chloride and an alkalinising bicarbonate component.

Adult dose

Dose: Prevention and treatment of hypokalaemia: 2 to 4 tablets daily (24 to 48 mmol K+) is likely to provide an adequate prophylactic or therapeutic dose in most patients; larger doses may be indicated in more severe hypokalaemic conditions, regulated by the patient's response as determined by serum electrolyte levels and acid-base studies
Route: Oral — each tablet dissolved in water first; may be taken with food if preferred
Frequency: Daily; dose regulated by serum electrolytes and acid-base studies
Max: Approximate guideline ceilings by serum potassium (label: 'should be considered'): serum 3-4 mmol/l — maximum daily dose 50-100 mmol K+ (4-8 tablets); serum 2-3 mmol/l — maximum daily dose 100-200 mmol K+ (8-16 tablets). Serum potassium below 2 mmol/l may warrant intravenous replacement
Pinned product: Sando-K. §4.1 verbatim: 'Prevention and treatment of hypokalaemic states such as those associated with: i) Use of drugs which can induce potassium depletion e.g. frusemide, thiazide diuretics, corticosteroids, carbenoxolone and cardiac glycosides ... ii) Potassium loss resulting from severe diarrhoea, vomiting or fistulas; iii) Acid-base disturbances ...; iv) Decreased intake of potassium ...; v) Since this medicinal product contains chloride ions (Cl-), it may be used in the treatment of hypokalaemia associated with hypochloraemic alkalosis.' — matches; route oral matches. §4.2 verbatim: 'Dosage is dependent upon the clinical conditions and diet of the patient, however the administration of 2 to 4 tablets daily (24 to 48 mmol K+) is likely to provide an adequate prophylactic or therapeutic dose in most patients. Large doses may be indicated in more severe hypokalaemic conditions when the dose should be regulated by the patient's response as determined by serum electrolyte levels and acid-base studies.' Guidelines: 'A drop in serum potassium level of 1 mmol/l represents a loss of about 100-200 mmol of potassium from body stores. While serum potassium levels below 2 mmol/l may warrant intravenous replacement therapy, following are approximate guidelines in less severe potassium depletion: For serum levels between 2-3 mmol/l, a maximum daily dose of 100-200 mmol K+ (8-16 tablets) and for serum levels between 3-4 mmol/l, a maximum daily dose of 50-100 mmol K+ (4-8 tablets) should be considered.' FIXED-COMBINATION SCOPE: the retrieved sections do not state the milligram strength of each component per tablet; the dose is therefore anchored on the mmol K+ the label itself equates with the tablet counts, and tablet counts apply to Sando-K only — they must not be applied to any other potassium chloride/bicarbonate tablet. Elderly: no evidence of different dosage requirement, but supervise carefully (poor diet or impaired renal function may indirectly affect dosage or tolerability). PAEDIATRIC: the §4.2 heading is 'Adults and children' and prints one dose with no separate paediatric figure, so no paediatric block is given — Children: use a children's formulary.

Dose adjustments

Renal

No numeric renal dose adjustment is printed. §4.4: 'Care should be taken to avoid dosage in excess of requirements for patients with impaired renal function.' §4.3: contraindicated in severe renal impairment with oliguria.

Hepatic

Not stated — no hepatic-impairment statement appears in the retrieved sections.

Dose independently re-sourced from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — clinician-reviewed. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance or to any of the excipients
  • Severe renal impairment with oliguria
  • Inadequately treated Addison's disease
  • Hyperkalaemia from any cause
  • Crush injuries
  • Acute dehydration
  • Patients with rare hereditary problems of fructose intolerance, glucose-galactose malabsorption or sucrase-isomaltase insufficiency should not take this medicine (§4.4)

Side effects

  • Abdominal discomfort, diarrhoea, nausea and vomiting may occur
  • Gastric irritation (rare, because the tablets are taken in solution) — give with or after food if there are signs of gastric irritation
  • Moderate hyperkalaemia may be asymptomatic — if suspected, refer to the overdosage section

Interactions

  • Potassium-sparing diuretics and ACE inhibitors — the risk of hyperkalaemia must be considered (§4.4, §4.5)
  • Cardiac glycosides / digitalis — periodic evaluation of clinical status, serum electrolytes and ECG is particularly important (§4.4)
  • Hypertension — correction of hypokalaemia may lower blood pressure (§4.4)

Monitoring

  • Periodic evaluation of clinical status, serum electrolytes and the ECG when replacement therapy is undertaken — particularly in cardiac disease and in those receiving digitalis (§4.4)
  • Serum electrolytes and acid-base studies to regulate the dose in severe hypokalaemia (§4.2)
  • Acid-base balance in patients with acidosis (§4.4)
  • Blood pressure in hypertensive patients, since correcting hypokalaemia may lower blood pressure (§4.4)
  • Elderly patients should be carefully supervised (§4.2)

Clinical monograph

How it works

Potassium chloride replaces potassium and chloride, while potassium bicarbonate adds further potassium and a bicarbonate buffer, making the preparation useful where hypokalaemia coexists with a tendency to acidosis rather than alkalosis.

Prescribing in practice

  • Use cautiously in renal impairment and with potassium-sparing diuretics or RAS inhibitors because excess potassium intake can precipitate dangerous hyperkalaemia; the added bicarbonate also makes it unsuitable where alkalosis is present.
  • Dissolve the effervescent tablets fully in water before drinking to reduce gastrointestinal irritation.
  • The bicarbonate content can alter urinary pH and the handling of some other drugs, so consider interactions.

Monitoring

Monitor serum potassium, chloride, bicarbonate and renal function during supplementation.

Counselling the patient

  • Dissolve each tablet completely in water and drink once the fizzing stops.
  • Report palpitations, weakness or tingling, and attend for potassium blood tests.

Evidence & guidelines

Established formulary practice and current prescribing references support such combined potassium salts for oral replacement, with the SPC defining the chloride-plus-bicarbonate niche.

Reference: Confirm identity and dosing against the manufacturer SPC (eMC) and NICE. Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.