Evidence map›Paper›PMID 27493274›Full record

ArticleThe Journal of pharmacology and experimental therapeutics2016

Discriminative Stimulus Effects of Binary Drug Mixtures: Studies with Cocaine, MDPV, and Caffeine.

Gregory T Collins, Megan Abbott, Kayla Galindo, Elise L Rush, Kenner C Rice, Charles P France

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of pharmacology and experimental therapeutics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.3field-weighted citation impact, top 9% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 30 citations in OpenAlex.

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  16. The abuse-related effects of pyrrolidine-containing cathinones are related to their potency and selectivity to inhibit the dopamine transporter.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Gregory T CollinsDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.) collinsg@uthscsa.edu.
Megan AbbottDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.).
Kayla GalindoDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.).
Elise L RushDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.).
Kenner C RiceDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.).
Charles P FranceDepartments of Pharmacology (G.T.C., M.A., K.G., E.L.R., C.P.F.) and Psychiatry (C.P.F.), University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System (G.T.C.), San Antonio, Texas; and Chemical Biology Research Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland (K.C.R.).
The University of Texas Health Science Center at San Antonio · USNational Institute on Alcohol Abuse and Alcoholism · USNational Institute on Drug Abuse · USSouth Texas Veterans Health Care System · US

Funding

Medicinal Chemistry of Drugs Acting on Biogenic Amine ReceptorsZIADA000532 · NIDA · NATIONAL INSTITUTE ON DRUG ABUSE · PI RICE, KENNER · 2009 to 2020
$4.5M
Bath Salts: Abuse-related and Toxic EffectsR01DA039146 · NIDA · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI Gregory Collins · 2015 to 2026
$4.0M
Behavioral Pharmacology of Drug DependenceK05DA017918 · NIDA · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI FRANCE, CHARLES P · 2005 to 2014
$1.2M
Medicinal Chemistry of Hallucinogenic DrugsZIADA000529 · NIDA · NATIONAL INSTITUTE ON DRUG ABUSE · PI RICE, KENNER · 2009 to 2016
$864k
NIDA NIH HHS K05 DA017918NIDA NIH HHS R01 DA039146
6 · The paper itself

Abstract

Illicit drug preparations often include more than one pharmacologically active compound. For example, cocaine and synthetic cathinones [e.g., 3,4-methylenedioxypyrovalerone (MDPV)] are often mixed with caffeine before sale. Caffeine is likely added to these preparations because it is inexpensive and legal; however, caffeine might also mimic or enhance some of the effects of cocaine or MDPV. In these studies, male Sprague-Dawley rats were trained to discriminate 10 mg/kg cocaine from saline, and the discriminative stimulus effects of cocaine, caffeine, and MDPV were evaluated alone and as binary mixtures (cocaine and caffeine, MDPV and caffeine, and cocaine and MDPV) at fixed-dose ratios of 3:1, 1:1, and 1:3 relative to the dose of each drug that produced 50% cocaine-appropriate responding. Dose-addition analyses were used to determine the nature of the drug-drug interactions for each mixture (e.g., additive, supra-additive, or subadditive). Although additive interactions were observed for most mixtures, supra-additive interactions were observed at the 50% effect level for the 1:1 mixture of cocaine and caffeine and at the 80% effect level for all three mixtures of cocaine and caffeine, as well as for the 3:1 and 1:3 mixtures of cocaine and MDPV. These results demonstrate that with respect to cocaine-like discriminative stimulus effects, caffeine can function as a substitute in drug preparations containing either cocaine or MDPV, with enhancements of cocaine-like effects possible under certain conditions. Further research is needed to determine whether similar interactions exist for other abuse-related or toxic effects of drug preparations, including cocaine, synthetic cathinones, and caffeine.

Indexed as

AnimalsBenzodioxolesCaffeineCocaineDiscrimination, PsychologicalDose-Response Relationship, DrugDrug SynergismMalePyrrolidinesRatsRats, Sprague-DawleySynthetic CathinoneBenzodioxolesCaffeineCocainePyrrolidinesSynthetic Cathinone

Identifiers

PMID27493274
PMCPMC5034708
OpenAlexW2496841287

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.