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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Brain Res. 2017 Aug 19;1674:84–90. doi: 10.1016/j.brainres.2017.08.017

Table 2.

Diazepam Reversal of Hydrocodone Tolerance

Treatment Hydrocodone ED50 (mg/kg (95% C.L.))
Acute Hydrocodone + Vehicle 5.51 (4.97–6.12)
Acute Hydrocodone + Diazepam (2 mg/kg) 4.48 (3.22–6.25)
Chronic Hydrocodone + Vehicle 13.18 (11.00–15.80)*
Chronic Hydrocodone + Diazepam (0.5 mg/kg) 9.92 (7.74–12.70)*
Chronic Hydrocodone + Diazepam (2 mg/kg) 3.77 (2.83–5.04)
*

Significantly different than Acute Hydrocodone + Vehicle group based on non-overlapping 95%