If serum potassium is < 3.3 mEq / L (3.3 mmol / L), insulin should be withheld and potassium given at 40 mEq / hour until serum potassium is ≥ 3.3 mEq / L (≥ 3.3 mmol / L); if serum potassium is > 5 mEq / L (> 5 mmol / L), potassium supplementation can be withheld.