Urinary alkalinisation
Citric acid with potassium citrate
Brand names: Cymalon
Adult dose
Dose: 4g (1 sachet) in water TDS for up to 48h
Route: PO
Frequency: TDS
Clinical pearls
- Symptomatic relief of cystitis — does not treat infection
- Avoid in renal disease
Contraindications
- Hyperkalaemia
- Severe renal impairment
- Untreated UTI requiring antibiotics
Side effects
- GI upset
- Hyperkalaemia
Interactions
- Potassium-sparing diuretics
- ACEi/ARB
- Methenamine (effect reduced)
Reference: BNF; https://bnf.nice.org.uk/drugs/citric-acid-with-potassium-citrate/. Verify against your local formulary and the latest BNF before prescribing.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
- Hyperkalaemia Management Algorithm · Electrolyte Disorders
- Tumor Lysis Syndrome Risk (Cairo-Bishop) · Oncological Emergency
- FAST Exam Protocol — Focused Assessment with Sonography in Trauma · Trauma
- Urine Anion Gap · Acid-Base
- Transtubular Potassium Gradient (TTKG) · Electrolytes
- Bicarbonate Deficit Calculator · Acid-Base