Paradoxical Effects of the Opioid Antagonist Naltrexone on Morphine Analgesia, Tolerance, and Reward in Rats

	Abstract	Full	Pdf
Jan 2002	58	85	95
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Aug 2002	10	36	17
Sep 2002	8	29	25
Oct 2002	7	33	35
Nov 2002	14	40	22
Dec 2002	8	20	23
Jan 2003	6	37	28
Feb 2003	5	37	37
Mar 2003	8	37	23
Apr 2003	10	16	18
May 2003	9	48	41
Jun 2003	4	28	25
Jul 2003	21	37	21
Aug 2003	31	32	24
Sep 2003	11	48	56
Oct 2003	30	42	30
Nov 2003	56	39	35
Dec 2003	49	26	24
Jan 2004	31	32	25
Feb 2004	15	34	32
Mar 2004	20	59	39
Apr 2004	15	56	26
May 2004	14	54	25
Jun 2004	13	46	27
Jul 2004	31	37	26
Aug 2004	22	41	19
Sep 2004	19	48	27
Oct 2004	35	59	19
Nov 2004	14	62	20
Dec 2004	15	62	17
Jan 2005	17	103	35
Feb 2005	14	73	22
Mar 2005	29	75	47
Apr 2005	10	57	35
May 2005	18	52	34
Jun 2005	2	34	24
Jul 2005	4	48	17
Aug 2005	7	50	29
Sep 2005	11	47	20
Oct 2005	14	53	20
Nov 2005	10	39	15
Dec 2005	5	51	10
Jan 2006	5	119	19
Feb 2006	9	107	22
Mar 2006	11	73	17
Apr 2006	5	26	13
May 2006	15	27	18
Jun 2006	12	23	13
Jul 2006	11	30	20
Aug 2006	11	44	18
Sep 2006	13	39	14
Oct 2006	23	31	18
Nov 2006	19	40	13
Dec 2006	13	38	17
Jan 2007	11	32	10
Feb 2007	13	27	28
Mar 2007	12	34	30
Apr 2007	15	39	22
May 2007	13	31	24
Jun 2007	14	35	26
Jul 2007	9	17	18
Aug 2007	20	21	11
Sep 2007	8	31	14
Oct 2007	8	21	20
Nov 2007	12	17	17
Dec 2007	4	13	10
Jan 2008	8	36	19
Feb 2008	8	23	10
Mar 2008	10	34	21
Apr 2008	7	41	30
May 2008	10	34	11
Jun 2008	17	57	28
Jul 2008	7	34	17
Aug 2008	7	21	8
Sep 2008	14	34	19
Oct 2008	18	44	17
Nov 2008	24	52	21
Dec 2008	17	31	13
Jan 2009	13	27	14
Feb 2009	15	40	15
Mar 2009	23	39	19
Apr 2009	10	30	8
May 2009	8	41	8
Jun 2009	24	34	23
Jul 2009	23	21	16
Aug 2009	24	31	12
Sep 2009	20	50	12
Oct 2009	37	32	16
Nov 2009	27	14	10
Dec 2009	24	22	7
Jan 2010	22	31	8
Feb 2010	19	18	16
Mar 2010	22	22	22
Apr 2010	14	48	12
May 2010	17	51	10
Jun 2010	21	48	17
Jul 2010	21	26	8
Aug 2010	20	42	12
Sep 2010	20	42	9
Oct 2010	19	47	12
Nov 2010	19	51	11
Dec 2010	17	25	8
Jan 2011	18	28	12
Feb 2011	14	33	18
Mar 2011	17	33	20
Apr 2011	12	33	14
May 2011	19	19	22
Jun 2011	8	23	14
Jul 2011	11	13	8
Aug 2011	7	20	12
Sep 2011	16	28	23
Oct 2011	11	30	21
Nov 2011	14	41	31
Dec 2011	13	14	16
Jan 2012	9	18	22
Feb 2012	14	13	27
Mar 2012	20	26	28
Apr 2012	19	20	41
May 2012	19	29	30
Jun 2012	11	22	34
Jul 2012	10	22	25
Aug 2012	24	24	25
Sep 2012	15	16	30
Oct 2012	14	20	37
Nov 2012	27	22	42
Dec 2012	26	22	42
Jan 2013	16	18	159
Feb 2013	10	32	26
Mar 2013	6	16	46
Apr 2013	21	36	29
May 2013	23	23	25
Jun 2013	6	10	18
Jul 2013	12	7	21
Aug 2013	11	13	11
Sep 2013	15	8	25
Oct 2013	15	22	28
Nov 2013	20	18	35
Dec 2013	15	15	31
Jan 2014	17	13	14
Feb 2014	18	14	23
Mar 2014	12	20	34
Apr 2014	15	16	23
May 2014	9	14	19
Jun 2014	9	12	23
Jul 2014	21	19	32
Aug 2014	7	8	22
Sep 2014	15	15	13
Oct 2014	15	15	10
Nov 2014	20	17	7
Dec 2014	19	15	12
Jan 2015	18	22	7
Feb 2015	7	11	4
Mar 2015	21	16	10
Apr 2015	16	18	1
May 2015	6	19	9
Jun 2015	13	26	12
Jul 2015	13	41	14
Aug 2015	16	25	7
Sep 2015	14	7	7
Oct 2015	10	17	3
Nov 2015	7	14	2
Dec 2015	14	18	7
Jan 2016	13	17	29
Feb 2016	7	19	9
Mar 2016	23	22	16
Apr 2016	15	23	13
May 2016	14	31	14
Jun 2016	11	15	4
Jul 2016	12	19	15
Aug 2016	9	16	10
Sep 2016	18	22	10
Oct 2016	21	49	18
Nov 2016	16	113	13
Dec 2016	17	28	8
Jan 2017	5	46	16
Feb 2017	7	72	13
Mar 2017	6	58	10
Apr 2017	10	23	7
May 2017	6	24	4
Jun 2017	4	23	12
Jul 2017	5	19	5
Aug 2017	10	26	31
Sep 2017	0	34	13
Oct 2017	6	24	14
Nov 2017	17	50	34
Dec 2017	2	33	34
Jan 2018	7	58	33
Feb 2018	5	45	25
Mar 2018	11	30	18
Apr 2018	13	46	84
May 2018	10	45	34
Jun 2018	12	17	21
Jul 2018	12	27	43
Aug 2018	1	31	25
Sep 2018	7	20	35
Oct 2018	8	35	37
Nov 2018	13	27	60
Dec 2018	90	9	34
Jan 2019	55	1	7
Feb 2019	57	5	14
Mar 2019	29	1	3
Apr 2019	38	2	6
May 2019	67	1	10
Jun 2019	33	2	9
Jul 2019	44	3	13
Aug 2019	56	4	19
Sep 2019	27	2	9
Oct 2019	51	1	14
Nov 2019	51	7	13
Dec 2019	45	2	2
Jan 2020	42	3	3
Feb 2020	36	3	9
Mar 2020	24	1	6
Apr 2020	54	3	14
May 2020	58	1	4
Jun 2020	45	0	5
Jul 2020	34	1	9
Aug 2020	13	0	1
Sep 2020	30	2	7
Oct 2020	30	1	5
Nov 2020	34	3	8
Dec 2020	48	2	3
Jan 2021	32	4	6
Feb 2021	36	1	2
Mar 2021	41	4	5
Apr 2021	31	6	8
May 2021	33	3	5
Jun 2021	27	3	2
Jul 2021	35	2	8
Aug 2021	22	2	15
Sep 2021	24	2	3
Oct 2021	50	4	14
Nov 2021	35	5	7
Dec 2021	38	5	3
Jan 2022	48	2	3
Feb 2022	29	4	5
Mar 2022	27	3	3
Apr 2022	50	3	7
May 2022	40	2	3
Jun 2022	35	4	7
Jul 2022	53	1	3
Aug 2022	37	3	2
Sep 2022	27	6	4
Oct 2022	39	2	5
Nov 2022	33	3	2
Dec 2022	26	3	5
Jan 2023	47	2	6
Feb 2023	40	3	6
Mar 2023	13	1	4