Guideline Recommendations for Trazodone‑Induced Hyponatremia

Initial Assessment and Drug Discontinuation

Immediately discontinue trazodone in any patient identified with hyponatremia; drug cessation is the primary intervention for trazodone‑induced SIADH. 1

Transfer patients to an intensive‑care setting and monitor serum sodium every 2 hours to allow rapid detection of over‑correction. 1
Administer 3 % hypertonic saline aiming for a rise of ≈6 mEq/L within the first 6 hours or until severe neurologic symptoms resolve. This controlled correction mitigates cerebral edema while addressing life‑threatening hyponatremia. 1
Limit total sodium correction to ≤8 mEq/L in the first 24 hours; after an initial 6 mEq/L rise in the first 6 hours, restrict further increase to ≤2 mEq/L over the remaining 18 hours. This prevents osmotic demyelination. 1
Calculate the sodium deficit using:

Transfer to an intermediate‑care unit and monitor serum sodium every 4 hours. This setting balances safety with resource utilization. 1
Implement fluid restriction to 1 L/day as the cornerstone therapy for SIADH‑related hyponatremia. 1
If fluid restriction alone is insufficient, add oral sodium chloride 100 mEq three times daily to increase free water excretion. 1
Consider a high‑protein diet to raise urinary solute load and enhance free‑water clearance. 1

Maintain fluid restriction at 1 L/day as first‑line therapy. 1
Perform daily serum sodium measurements to track trends and adjust therapy promptly. 1
Provide oral sodium supplementation when needed to achieve target sodium levels. 1

Do not apply fluid restriction in volume‑depleted patients; assess volume status first to avoid worsening hypovolemia. 4
Avoid rapid over‑correction in chronic hyponatremia (>48 h); correction rates >1 mmol/L per hour increase the risk of osmotic demyelination syndrome. 5
Reserve rapid correction (e.g., hypertonic saline) for acute hyponatremia (<48 h) with severe neurologic symptoms to balance efficacy and safety. 2

Continue serum sodium monitoring until levels stabilize above 131 mmol/L, confirming resolution after drug cessation. 2