General statistics of predator drugs[edit]
Previously, Weir noted that cases of drug-facilitated sexual assault were frequently found to involve alcohol, marijuana or cocaine, and were less likely to involve drugs, such as flunitrazepam (Rohypnol) and gamma-hydroxybutyrate [(GHB)], that are commonly described as being used in this context. Similar findings have been reported by others, including Hall and colleagues in a recent retrospective study from Northern Ireland.
Bernadette Butler, MB BS and Jan Welch, MB BS BSc, Drug-facilitated Sexual Assault[11]
One study in the UK concluding that that there was "no evidence to suggest widespread date rape drug use" in the UK and that no cases in 120 examined involved rohypnol and just two involved GHB.[12][13]