Results 31 to 40 of about 3,219 (234)

A simple open source bioinformatic methodology for initial exploration of GPCR ligands’ agonistic/antagonistic properties

open access: yesPharmacology Research &Perspectives, Volume 8, Issue 4, August 2020., 2020
Abstract Drug development is an arduous procedure, necessitating testing the interaction of a large number of potential candidates with potential interacting (macro)molecules. Therefore, any method which could provide an initial screening of potential candidate drugs might be of interest for the acceleration of the procedure, by highlighting ...
Athanasios A. Panagiotopoulos   +8 more
wiley   +1 more source

Development of natural products as drugs acting on central nervous system

open access: yesMemorias do Instituto Oswaldo Cruz, 1991
We have recenty studied several natural product constituents which have effects on the CNS. (1) Tetrahydropalmatine (THP) and its analogues were isolated from Corydalis ambigua and various species of Stephania.
Xing-Zu Zhu
doaj   +1 more source

Analysis of naltrexone and its metabolite 6-beta-naltrexol in serum with high-performance liquid chromatography

open access: yesBMC Research Notes, 2012
Background Naltrexone has been proven to be an effective treatment option for the treatment of alcohol dependency. In this article we introduce a reliable and simple method developed for the simultaneous determination of naltrexone and 6-β-naltrexol in ...
Heinälä Pekka   +5 more
doaj   +1 more source

Isolation of Nalorphine Ethereal Sulfate and Nalorphine Glucuronide from Urine of Cat and Rabbit

open access: yesExperimental Biology and Medicine, 1969
SummaryIsolation of a major metabolite of nalorphine from the urine of the cat was accomplished. This metabolite was nalorphine-3-ethereal sulfate by chemical synthesis of the compound. Evidence is presented to characterize the crystalline metabolite isolated from the urine of the rabbit as nalorphine-3-glucuronide.
Vernon B. Haarstad   +2 more
openaire   +3 more sources

THE CONCISE GUIDE TO PHARMACOLOGY 2019/20: G protein‐coupled receptors

open access: yesBritish Journal of Pharmacology, Volume 176, Issue S1, Page S21-S141, December 2019., 2019
The Concise Guide to PHARMACOLOGY 2019/20 is the fourth in this series of biennial publications. The Concise Guide provides concise overviews of the key properties of nearly 1800 human drug targets with an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www ...
Stephen P H Alexander   +138 more
wiley   +1 more source

Analgesic and Nonanalgesic Effects of Intravenous Hydromorphone ‐ Relation to Plasma Concentrations in Healthy Volunteers

open access: yesPain Research and Management, Volume 1, Issue 2, Page 86-92, 1996., 1996
OBJECTIVE: To investigate the analgesic and nonanalgesic effects and the pharmacokinetics of an intravenous infusion of 2 mg hydromorphone over 20 mins. DESIGN: Open study. SUBJECTS: Twelve healthy volunteers. MEASUREMENTS: The analgesic effect of hydromorphone was evaluated serially using pressure pain thresholds (PPTs) measured on the third fingers ...
D Westerling   +3 more
wiley   +1 more source

NATURAL NARCOTICS: PHYTOCHEMICAL CONTENT ANALYSIS AND THEIR SOCIAL HAZARDS [PDF]

open access: yes, 2020
Narcotics can cause a wide range of adverse effects. The analysis of the narcotics phytochemical content utilizing rapid and efficient techniques have become of imminent need.
Raafat, Kareem
core   +1 more source

Bile analysis in heroin overdose. [PDF]

open access: yes, 2007
Following its metabolism in the liver, morphine and its metabolites can be directly eliminated in bile. Then, they undergo the enterohepatic cycle (EHC) and mostly reappear in the circulation. We report a case showing the presence of morphine in bile (21.
C. CACACI   +3 more
core   +1 more source

Bivalent and bitopic ligands of the opioid receptors: The prospects of a dual approach

open access: yesMedicinal Research Reviews, Volume 44, Issue 6, Page 2545-2599, November 2024.
Abstract Opioid receptors belonging to the class A G‐protein coupled receptors (GPCRs) are the targets of choice in the treatment of acute and chronic pain. However, their on‐target side effects such as respiratory depression, tolerance and addiction have led to the advent of the ‘opioid crisis’.
Marie Emilie Hovah, Ulrike Holzgrabe
wiley   +1 more source

Method of Administering Narcotic Antagonists and Analgesics and Novel Dosage Forms Containing Same [PDF]

open access: yes, 1984
The invention provides a novel method of administering narcotic antagonists, narcotic analgesics and related compounds, and novel dosage forms containing those compounds which are adapted for nasal administration. The nasal dosage forms disclosed include
Hussain, Anwar A.
core   +1 more source

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