I Have A Morphine Pain Pump. Have Been On It

I have a Morphine pain pump. Have been on it for a year. Are there any long term side effects that can show up now? Can take MS orally also for break through pain. Have had nausea, vomiting intermittently for 3 weeks. Pump acting ok per Md check. Going for dye job for cath patency. Is there something like morphine poisioning? Thanks. YYYY@YYYY