Contraindications

Uncompensated congestive heart failure

Pulmonary hypertension

Sickle cell anemia

Severe COPD

Cautions

Compensated congestive heart failure

Troublesome arrhythmias

Sickle cell trait

Moderate COPD

Seizure disorders (not controlled on medication)

Stable angina or coronary artery disease

Sleep apnea

High-risk pregnancy