Clinically significant or unstable cardiovascular or respiratory conditions |
 COPD or other significant pulmonary insufficiency |
 Sleep apnoea with morbid obesitya |
 Uncontrolled bradyarrhythmias or tachyarrhythmias, leading to haemodynamic instability |
 History of MI |
 Haemodynamically significant valvular heart disease or heart failureb |
Other comorbidities |
 Presence or history of psychosis |
 Presence or history of mania or bipolar disorder |
 Hyperthyroidism that has not been sufficiently treated |
 Conditions associated with increased intracranial pressurec |