ArticleFrontiers in pharmacology2021
Impact of Morphine Dependence and Withdrawal on the Reinforcing Effectiveness of Fentanyl, Cocaine, and Methamphetamine in Rats.
Article in Frontiers in pharmacology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
27 citing papers in PubMed, 31 citations in OpenAlex.
- It's not all DAT: harnessing the potential of organic cation transporter 3 inhibition to selectively attenuate amphetamine reinforcement and dopamine release.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026Article
- The quantitative economon model as a novel computational tool for addiction research.Experimental and clinical psychopharmacology · 2026Article
- The role of polysubstance use in the development, maintenance, and treatment of stimulant use disorders.Pharmacological reviews · 2026Review
- Impact of morphine dependence and withdrawal on economic demand for fentanyl, cocaine, and methamphetamine in rats.Drug and alcohol dependence · 2026Article
- Reviving the Fight against Opioid Overdoses: Unleashing the Power of Metal-Organic Frameworks for Morphine Removal.ACS applied materials & interfaces · 2025Article
- Spontaneous daily sleep disruptions associated with morphine dependence and withdrawal in rats.The Journal of pharmacology and experimental therapeutics · 2025Article
- Interactions between cardiorespiratory effects of fentanyl and xylazine and their reversal in male and female Sprague-Dawley rats.The Journal of pharmacology and experimental therapeutics · 2025Article
- Cardiovascular and locomotor effects of binary mixtures of common 'bath salts' constituents: Studies with methylone, methylenedioxypyrovalerone and caffeine in rats.British journal of pharmacology · 2025Article
- Naloxone reversal of the cardiorespiratory depressant effects of opioids and mixtures of opioids and stimulants in rats.Frontiers in pharmacology · 2025Article
- Differential Effects of Intrahippocampal Administration of Ceftriaxone on Morphine Dependence and Withdrawal Syndrome in Rats.ACS omega · 2024Article
- Exercise preconditioning mitigates brain injury after cerebral ischemia-reperfusion injury in rats by restraining TIMP1.Immunity, inflammation and disease · 2024Article
- The Effects of Eating a Traditional High Fat/High Carbohydrate or a Ketogenic Diet on Sensitivity of Female Rats to Morphine.The Journal of pharmacology and experimental therapeutics · 2024Article
- Gut Microbiome-Mediated Mechanisms in Alleviating Opioid Addiction with Aqueous Extract ofBiomedicines · 2024Article
- Xylazine does not enhance fentanyl reinforcement in rats: A behavioral economic analysis.Drug and alcohol dependence · 2024Article
- Xylazine suppresses fentanyl consumption during self-administration and induces a unique sex-specific withdrawal syndrome that is not altered by naloxone in rats.Experimental and clinical psychopharmacology · 2024Article
- Impacts of xylazine on fentanyl demand, body weight, and acute withdrawal in rats: A comparison to lofexidine.Neuropharmacology · 2024Article
- Cardiovascular and Locomotor Effects of Binary Mixtures of Common "Bath Salts" Constituents: Studies with Methylone, MDPV, and Caffeine in Rats.bioRxiv : the preprint server for biology · 2024Article
- Impacts of Self-Administered 3,4-Methylenedioxypyrovalerone (MDPV) Alone, and in Combination with Caffeine, on Recognition Memory and Striatal Monoamine Neurochemistry in Male Sprague-Dawley Rats: Comparisons with Methamphetamine and Cocaine.bioRxiv : the preprint server for biology · 2024Article
- Oxycodone withdrawal is associated with increased cocaine self-administration and aberrant accumbens glutamate plasticity in rats.Neuropharmacology · 2024Article
- Trihexyphenidyl Alters Its Host's Metabolism, Neurobehavioral Patterns, and Gut Microbiome Feedback Loop-The Modulating Role ofAntioxidants (Basel, Switzerland) · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
Recent estimates suggest increased popularity of the concurrent use of opioids and stimulants, with over 50% of treatment-seeking opioid users reporting regular stimulant use. The goal of the current study was to determine how opioid dependence and withdrawal affect the reinforcing effects of fentanyl, cocaine, and methamphetamine. Male Sprague-Dawley rats were allowed to self-administer fentanyl under a progressive ratio (PR) schedule of reinforcement. Baseline evaluations of reinforcing effectiveness of fentanyl, cocaine, and methamphetamine were determined. Opioid dependence was then established by administering escalating doses of morphine (10-40 mg/kg) twice-daily for four days and subsequently maintained by once-daily injections of 40 mg/kg morphine. To evaluate the impact of opioid dependence and withdrawal on the self-administration of fentanyl, cocaine, and methamphetamine, sessions occurred either 12 or 20 h after the morphine, respectively. During opioid withdrawal, the fentanyl dose-response curve was shifted rightward with an increase in maximal effectiveness, whereas it was shifted rightward with a reduction in maximal effectiveness when evaluated in rats currently dependent on opioids, relative to baseline. The reinforcing effects of cocaine and methamphetamine were unchanged by either condition. The current studies provide direct evidence that the reinforcing effects of fentanyl are increased in opioid-withdrawn rats and reduced in opioid-dependent rats, relative to rats that are not physically dependent on opioids. These findings suggest that motivations to use opioids are dependent on the state of the individual whereas stimulants retain their reinforcing effects regardless of whether the individual is in an opioid-dependent or withdrawn state.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.