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Baseline EtOH intake and nicotine self-administration in Phase 1 (EtOH alone) and Phase 2 (co-use) of Experiments 1 and 2. Panel A: EtOH consumed in Phase 1 (Experiment 1) and Phase 2 under either FR5 or FR30 schedule of nicotine self-administration (Experiment 2). Panel B: Nicotine infusions earned in Phase 2 under either FR5 or FR30 schedules of nicotine self-administration (Experiment 2). Values represent mean ± SEM. *p < 0.05 vs Phase 1, #p < 0.05 vs FR5.
