From: Morphine versus methylprednisolone or aminophylline for relieving dyspnea in patients with advanced cancer in China: a retrospective study
Adverse events
Morphine
Methylprednisolone
Aminophylline
Somnolence
62
None
Constipation
55
Nausea/vomiting
28
14
Dizziness
19
Flushing
3
11
Xerostomia
5