The present study was undertaken to extract ketamine powder from ketamine hydrochloride by precipitate ketamine. After that we examine the purity of this powder by infra-red (FTIR) and ultra-violet(UV) spectroscopy. ketamine gel in different concentrations was prepared ( 0.5 , 1 , 5 , 10 , 15 )% to evaluate the antinociceptive activity. ketamine powder was seen is pure and this show in infra-red and ultra-violet scanner. Ketamine gel at concentrations 0.5, 1, 5, 10,15) % produce antinociceptive in mice (5.6±2.2) (4.4±2.0) (8.2±4.3) (10.6±5.2) (8±2.1) second after 2 min respectively by using a hot plate test in comparison with control(2.4±2). The percentage of maximum possible effect (MPE) increased from (9.9) % in control group to (23.3) (18.3) (34.2) (44.2) (33.3)% respectively according to the concentrations of ketamine gel after 2 min . Purification of ketamine powder from ketamine solution and use as a gel to could be of value relief pain by topical application.
Table of Contents
1. INTRODUCTION
2. MATERIALS AND METHODS
2.1 Preparation of ketamine powder
2.2 Infrared Spectroscopy.
2.3 Electronic Spectra Measurement:
2.4 Preparation of ketamine gel
2.5 Determination of Analgesic Activity of Ketamine Gel by Using a Hot –Plate Test:
2.6 Statistical analysis
3. RESULTS
4. DISCUSSION
5. CONCLUSION
Research Objectives and Core Themes
The primary objective of this study is to extract pure ketamine powder from ketamine hydrochloride, formulate it into topical gels of varying concentrations, and evaluate its analgesic efficacy in mice using the hot-plate test model.
- Chemical purification of ketamine from solution and structural confirmation via spectroscopy.
- Development of topical ketamine gel formulations at concentrations ranging from 0.5% to 15%.
- Assessment of antinociceptive (pain-relieving) activity in murine models.
- Statistical evaluation of reaction times and maximum possible effect (MPE) to determine therapeutic potential.
Excerpt from the Book
INTRODUCTION
Ketamine, a phencyclidine (PCP) analog, has been used for more than 30 years to produce “dissociative” anesthesia (1). In this state the patient is awake and can respond to stimuli but has a diminished sense of awareness and an amnesia for events occurring while under the influence of ketamine.Early experience with ketamine revealed that it also produced analgesia that sometimes well outlasted its anesthetic effects. Although the mechanisms of ketamine’s analgesic effects remain the subject of debate, and are likely multiple(2-4). Antagonism at the NMDA receptor site appears to be central to both its anesthetic and analgesic effects (5,6). Ketamine is available only I.M , I.V administration but it has been used orally.
Ketamine is a dissociative anesthetic that is used to provide sedation and anesthesia in short surgical procedure, Patient may have adverse psychological effect including hallucinations, nightmares, delusion, dissociative reaction and schizophrenic form psychosis (7). Ketamine is primarily used for the induction and maintenance of general anesthesia, usually in combination with a sedative. Other uses include sedation in intensive care, analgesia (particularly in emergency medicine), and treatment of bronchospasm. It has been shown to be effective in treating depression in patients with bipolar disorder who have not responded to other anti-depressants (8) . Pharmacologically, ketamine is classified as an N-Methyl D-Aspartat (NMDA) receptor antagonist (9).
Summary of Chapters
INTRODUCTION: Provides an overview of ketamine's history, pharmacological profile as an NMDA receptor antagonist, and the rationale for developing non-invasive topical delivery systems.
MATERIALS AND METHODS: Details the chemical extraction process of ketamine powder, its spectroscopic verification, and the experimental protocol for testing analgesic efficacy in mice.
RESULTS: Presents the spectroscopic data confirming ketamine purity and the quantitative results of the hot-plate tests conducted at different time intervals.
DISCUSSION: Interprets the experimental findings in the context of existing literature, focusing on the peripheral action of ketamine on NMDA and other pain-related receptors.
CONCLUSION: Summarizes the study's findings, highlighting that topical ketamine gel offers a promising new option for clinical pain management.
Keywords
Purification of ketamine, Ketamine gel, analgesia, Infrared spectroscopy, Hot-plate test, NMDA receptor, topical administration, antinociceptive activity, pharmacology, drug delivery, pain relief, mice model, dissociative anesthesia, cyclohexanone, neurotransmitter.
Frequently Asked Questions
What is the primary focus of this research?
The research focuses on the extraction and purification of ketamine from a hydrochloride solution and the subsequent evaluation of its analgesic effectiveness when administered as a topical gel.
What are the central themes discussed in the study?
The study centers on pharmaceutical formulation, analytical chemistry (spectroscopy), and pharmacology, specifically examining pain management and drug delivery technologies.
What is the main research objective?
The primary aim is to determine if topically applied ketamine gel can provide significant pain relief (analgesia) in mice using a hot-plate test model.
Which scientific methodology was employed?
The researchers utilized infrared (FTIR) and UV spectroscopy for purity analysis, followed by an in-vivo animal study using the hot-plate test method to measure reaction times in mice.
What topics are covered in the main body of the paper?
The paper covers the extraction process, the preparation of gel concentrations (0.5% to 15%), the experimental procedure for animal testing, statistical analysis, and a discussion of the pharmacological mechanisms.
Which keywords define this work?
Key terms include ketamine purification, topical analgesia, NMDA receptor antagonism, hot-plate test, and drug delivery systems.
Why is topical application considered a promising concept in this study?
Topical application is seen as advantageous because it bypasses first-pass metabolism, is non-invasive, and utilizes the skin's large surface area for direct access to sensory receptors involved in pain transmission.
How did the researchers verify the structure of the converted ketamine product?
The structure was verified by examining the powder using infra-red (FTIR) and ultra-violet (UV) spectroscopy, confirming the presence of characteristic bands like the N-H stretch and carbonyl groups.
What was the observed effect of ketamine gel concentration on pain relief?
The study found that analgesic activity was concentration-dependent, with specific concentrations showing highly significant differences in reaction times after two minutes of application.
- Arbeit zitieren
- Amer Taqa (Autor:in), Banan N. Alhussary (Autor:in), Ghada A. Taqa (Autor:in), 2012, Extraction of Pure Ketamine Powder and Study their Analgesic Effect as a Gel on Mice Using a Hot – Plate Test, München, GRIN Verlag, https://www.grin.com/document/209705
