serotonin syndrome

The manifestations of the serotonin syndrome fall into three general areas:

1. Cognitive or behavioral changes such as confusion, agitation, lethargy, and coma.
2. A condition that is referred to as autonomic instability that includes elevated temperature, rapid heart rate, sweating, nausea, vomiting, diarrhea, and dilated pupils.
3. Neuromuscular changes that include spasm or twitching a muscle or group of muscles, exaggerated reflexes, and tremor.

Here's a list of drugs that have been associated with this according to article in bestpillsworstpills