Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Apr 28;48(12):1716–1723. doi: 10.1038/s41386-023-01590-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s), under exclusive licence to American College of Neuropsychopharmacology 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

PMC Copyright notice

Fig. 3 — This figure depicts the effects of naltrexone (0.01–0.03 mg/kg; striped bar) and (±)VK4-40 (3.0–5.6 mg/kg; white bar) on the peak number of oxycodone injections (0.01–0.1 mg/kg; black bar) in monkeys responding under a PR schedule of reinforcement Each bar represents the mean (N = 4) ± standard error of the mean (SEM). *p < 0.05; **p < 0.01.