Antipsychotics and Risk of Acute Respiratory Failure in U.S. Medicare Beneficiaries with Chronic Obstructive Pulmonary Disease.

IMPORTANCE

Acute respiratory failure (ARF) associated with antipsychotic use has been documented through case reports and population-based studies.

OBJECTIVE

To assess whether the recent use of antipsychotics is associated with an increased risk of ARF in U.S. Medicare beneficiaries with chronic obstructive pulmonary disease.

DESIGN, SETTING, AND PARTICIPANTS: Case-crossover study conducted among U.S. Fee-for-Service Medicare beneficiaries with chronic obstructive pulmonary disease hospitalized with ARF, from January 1, 2007, through December 31, 2019.

EXPOSURE

Oral antipsychotics.

MAIN OUTCOME(S) AND MEASURE(S): Adjusted odds ratios (aOR) and 95% confidence intervals (CI) for ARF requiring invasive mechanical ventilation associated with the use of antipsychotics in the case period (days -14 to -1) compared to the control period (days -75 to -88).

RESULTS

We identified 145,018 cases (mean age 69.4 years, 57.2% female). Of these, 2,003 had antipsychotic use only during the case period and 1,728 only during the control period. The aOR of ARF within 14 days after antipsychotic use was 1.13 (95% CI, 1.06, 1.20). The risk increased with increasing age, being statistically significant in patients ages 75-84 years (aOR: 1.37 [95% CI, 1.17, 1.60]) and 85 + years (aOR: 1.50 [95% CI, 1.20, 1.89]), but not in beneficiaries under 75 years of age (aOR 18-49 years: 1.01 [95% CI, 0.85, 1.20]; 50-64 years: 1.03 [95% CI, 0.92, 1.15]; 65-74 years: 1.12 [95% CI, 0.98, 1.27]).

CONCLUSIONS AND RELEVANCE

Recent antipsychotic use by Medicare beneficiaries with chronic obstructive pulmonary disease was associated with an increased risk of ARF in those aged 75 years and older.