Hallucinogenic drugs may resemble serotonin.Logical formLearned from2 sentences. Serotonin may produce.Logical formLearned from2 sentences. Serotonin may undergo a recycling.Logical formLearned from2 sentences. A (serotonin theory) may be constructed.Logical formLearned from2 sentences. Presence can be constituted-of-or-filled-with serotonin.Logical formLearned from2 sentences. Levels of serotonin can be low.Logical formLearned from2 sentences. Serotonin may serve as a neuromodulator.Logical formLearned from2 sentences. Help may be obtained by increasing concentration of serotonin.Logical formLearned from2 sentences. Actions may pertain-to serotonin.Logical formLearned from2 sentences. Patients may have levels of serotonin.Logical formLearned from2 sentences. Animals can be with (serotonin activity).Logical formLearned from2 sentences. Serotonin may exert an effect.Logical formLearned from2 sentences. A (serotonin level) can be high.Logical formLearned from2 sentences. Neurons may contain serotonin.Logical formLearned from2 sentences. Serotonin may undergo depletions.Logical formLearned from2 sentences.