Logline
Uhura seems to be the only one who can hear a strange sound. When the noise triggers terrifying hallucinations, she enlists an unlikely assistant to help her track down the source.
Written by Onitra Johnson & David Reed
Directed by Dan Liu
Deuterium is toxic (in high concentrations) to multicell animals as it changes the angle of.the hydrogen bonds which is key to cellular replication and enzyme prodcution. However you would have to drink all d2o instead of h2o for about a week to begin to notice (need 25-50% of body water). Blocking cellular replication is similar to what chemotherapy does so would.be like bad chemo…eventually the dose is so large it is not useful Cancer drug.
There is also mentions of dizziness and impact on vestibular system (senses) but not the wiki article does not expand on this and the linked article just mentions nystagmus (involuntary eye movements)
https://ui.adsabs.harvard.edu/abs/1974Natur.247…404M/abstract
https://en.m.wikipedia.org/wiki/Heavy_water
Interestingly there is also a theory it may affect circadian cycles in some insects https://www.ncbi.nlm.nih.gov/pmc/articles/PMC433660/ (which could impact sleep pattern in humans)
All in all it looks like the writers may have looked into it afterall.