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46DESIGNER DRUGSthat taking GHB drastically increases the messages carriedby the brain’s own GHB. GHB may also interact with a wellknownchemical messenger in the brain called GABA (gammaamino butyric acid).Table 4.1 lists the brain regions where GHB is believed toproduce its effects.Table 4.1 GHB’s Effect on the BrainEFFECTDrowsiness and sleepEuphoria, positive feelings,reduced inhibitionsHallucinations, increasedsexual driveLoss of balance, motorimpairmentReduced respirationAmnesiaBRAIN REGION(S)Frontal cortex, brainstem,hypothalamusFrontal cortex, limbicsystemVisual cortex, limbicsystemCerebellumBrainstemHippocampus(limbic system)GHB may also act directly on muscles to produce relaxationand decreased heart rate.GHB AS A DATE RAPE DRUGAlthough the most well-known date rape drug is Rohypnol(see Chapter 5), the effects of GHB have also been exploitedand used to commit sexual assault. In fact, the number ofGHB-related sexual assaults in recent years has paralleled oreven surpassed those involving Rohypnol. The number ofGHB-related sexual assaults may be vastly underestimatedbecause GHB is metabolized rapidly by the body and is oftennot detectable in blood or urine when the victim reports the

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