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“ | Incite’s revolutionary tab technology taps into the olfactory nerve for direct access to your limbic system. Once placed in the mouth, these fully dissolvable limbic tabs transmit a digital code to the brain, which is immediately translated into electrical impulses. | ” |
–Incite Inc |
Caleb's Drip appears to be a military version of the Incite Inc. Limbic Mood control system. Fuller details here at Incite's Web site but this was first seen in s3e1 "Parce Domine" where Gerald puts a strange looking flat pill (a tab) in the roof of his mouth and selects a mood from the tablet running an Incite app on his bedside table.