Final answer:
The described symptoms may suggest serotonin syndrome, a serious condition caused by excess serotonin. It can occur after consuming certain foods, medications, or drugs that increase serotonin levels. Immediate medical evaluation is necessary.
Step-by-step explanation:
The symptoms described - pounding head, flushing, nausea, myoclonus - after consuming cheese, red wine, taking a decongestant, or merperidine may indicate a condition known as serotonin syndrome. This potentially life-threatening condition is due to an excess of serotonin in the brain and is often triggered by substances that increase serotonin levels or activity. Symptoms of serotonin syndrome can range from mild to severe and can include agitation, anxiety, sleep problems, and abnormal heart rhythms, among others. Immediate medical attention is required if serotonin syndrome is suspected.