The most common side effects of this type of morphine include nausea and vomiting, feeling lightheaded, feeling drowsy, dry mouth, constipation, dizziness and increased sweating. Getting plenty of water, fiber and exercise will help to prevent constipation. Consulting a pharmacist about a laxative can be helpful as well.
Serious, but unlikely side effects include shallow or slow breathing, mood or mental changes, vision changes, fainting, trouble urinating and fast or slow heart beat. Some of the mood or mental changes may include hallucinations, confusion or agitation.
Very serious, but rare side effects include amount of urine changes, severe stomach or abdominal pain and seizures. A very serious allergic reaction is also possible, but rare.