^ good response.
The myth of CSF depletion originated from the early testing done on MDMA patients in hospitals.
In the 80s and early 90s doctors would do a spinal tap to test the metabolites of 5HT in an attempt to determine why the patients were exhibiting such terrible symptoms. It was a research methodology that was discontinued because it was determined that TPH and 5HT concentration were not predictive of symptoms. Some people had very low levels and no symptoms...
Young drug users, in all their brilliance, somehow associated the withdrawal of spinal fluid for testing as a 'loss' that might eventually lead to trouble.
In fact the CSF is replaced by the body. Then this misinformation was spread as "Tabs cause your spinal fluid to be used up."
Just an ignorant early miscommunication amongst drug users.
Stiff neck is probably common, as is sore jaw and back muscles.
MDMA is a very strong drug experience and must be appreciated for this.
However, it is also possible that another cause is at play.
The vagus nerve that travels from the gut, where serotonin lives to contract intestinal muscle cells, travels through the neck to the brain.
If your serotonin system is not handling the drain very well, perhaps your gut is causing distress that ends up tightening the muscles at the base of the brain.
Tight neck is a common complaint of those recovering from MDMA toxicity.
That includes me, and it continues to be an issue after many years.
If you find that your neck tightness is a little too strong to be considered appropriate, then you might think of this as a warning sign.
The body is connected in strange ways and you might be getting a signal that your brain can't withstand such a powerful drug.