Suggest Treatment For Sickness While On Medication For Collapsed Vertebrae

Hi My wife recently came out of hospital after suffering acute pain due to a collapsed vertebrae. The pain control programme includes morphine patches, paracetamol and others. For the past two days she has suffered feeling very sick and this morning was violently sick. The sick was like a yellow "egg yolk". She also had her Gall Bladder removed about ten years ago. Can you please advise me what I should do.