High risk comorbidity heart failure or coronary disease
Observation pathway criteria
Observation suitable
Moderate hypokalemia 2.5 to 2.9 mmol/L with mild symptoms
Single round IV replacement with stable ECG
Reliable follow up and repeat labs within 24 hours
Discharge criteria
Discharge requirements
Symptoms resolved or clearly improving
Potassium at least 3.0 mmol/L and rising
No concerning ECG changes
Etiology addressed or plan in place
Reliable follow up arranged
Follow up timing
Follow up plan
Repeat potassium within 24 to 72 hours based on severity
Primary care follow up within 1 week
Nephrology or endocrinology follow up if renal wasting or aldosteronism suspected
Discharge Instructions
Copy discharge instructions
Diagnosis summary
Low potassium level caused symptoms
Potassium was treated and is improving
Medications
Take potassium supplement exactly as prescribed
Do not take extra doses unless instructed
If on diuretics follow the updated dose plan
Diet and fluids
Maintain normal hydration
Include potassium containing foods unless told not to
Follow up
Get repeat bloodwork within the recommended timeframe
Follow up with your clinician within 1 week
Return to emergency criteria
Chest pain
Fainting
Severe weakness
Trouble breathing
New palpitations
Persistent vomiting
New neurologic symptoms
References
Guidelines and key sources
Reference list
American Heart Association Guidelines for CPR and ECC 2020
American Heart Association Focused Updates to CPR and ECC 2023
Endocrine Society Clinical Practice Guideline Primary Aldosteronism 2016
KDIGO Clinical Practice Guideline for Acute Kidney Injury 2012
Gennari FJ Hypokalemia New England Journal of Medicine 1998
Local hospital electrolyte replacement protocol local protocol dependent
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.