A selective serotonin reuptake inhibitor -- that is what an SSRI stands for. The drug limits the reabsorption of serotonin, which in turn increases the levels of serotonin in the synaptic cleft. The theory goes that individuals prone to debilitating depression and anxiety cannot properly process average levels of serotonin, and that compounds their psychological distress.

[Chilton waved his hand, impatient -- while it was wholly within Toby's right to inquire, Chilton didn't want to devil out the details. He was much too used to his own command.]

I am assuming your vampiric brain is still similar to its human counterpart.

[But he didn't know for sure, and that's why he wanted to experiment.]

Being around him makes you happy. [Repetition with lingering doubt.] In your current depressive state, he is like an intoxication to you?