constipation; warmth, tingling, or redness under your skin; nausea, vomiting, stomach pain, diarrhea, loss of appetite; dizziness, headache, anxiety; memory problems; or sleep problems (insomnia). So your symptoms certainly "fit" that of Morphine side effects. And these can vary from person to person. While one person may only have the headaches another may experience nausea, headaches and lightheadedness and still another only memory loss. Our systems are all different.