Short Communication
Volume 10 Issue 8 - 2018
Phenytoin in Personalized Medicine
Vivek Kumar Garg1*, Neelam Goel2, Seema Singh3 and Dharambir Kashyap4
1Demonstrator, Department of Biochemistry, Government Medical College and Hospital, Chandigarh, India
2Assistant Professor, University Institute of Engineering and Technology, Panjab University, Chandigarh, India
3Senior Resident, Department of Biochemistry, Government Medical College and Hospital, Patiala, Punjab, India
4Research Scholar, Postgraduate Institute of Medical Education and Research, Chandigarh, India
*Corresponding Author: Vivek Kumar Garg, Demonstrator, Department of Biochemistry, Government Medical College and Hospital, Chandigarh, India.
Received: June 05, 2018; Published: July 19, 2018
Citation: Vivek Kumar Garg., et al. “Phenytoin in Personalized Medicine”. EC Neurology 10.8 (2018): 727-728.
Epilepsy is a long running; heterogeneous neurological disease which is characterized by recurrent seizures. Smoking, lack of sleep, non-compliance of drugs are the main precipitating factors of epilepsy[1]. Phenytoin (PHT), Carbamazepine (CBZ), Phenobarbital (PBT) and Valproic Acid (VPA) are primary antiepileptic drugs (AEDs) used in the treatment of epilepsy. Other than these primary AEDs, many new generation AEDs are also available in the market such as lamotrigine (LTG), levetiracetam (LVT), oxcarbazepine (OXC), topiramate (TPM), pregabalin (PGB), gabapentin (GBP), zonisamide (ZNS) etc [1]. Despite these new AEDs, PHT is extensively used in the treatment of partial and generalized epilepsy. PHT is also given in traumatic brain injury induced epileptogenesis which decreases the quality of life of the affected patients[3]. PHT has narrow therapeutic range (10 - 20 μg/ml), below the level of 10 μg/ml it follows zero order kinetics and above this level it follows first order kinetics and shows some adverse drug reactions [2]. Some patients show side effects and some patients show good response to the same drug at same dose because of personalized medicine. Adverse drug reactions (ADRs) associated with PHT are dose dependent and dose independent. Dose dependent ADRs are cerebellar ataxia, nystagmus, sedation, diplopia and in dose independent ADRs, the most common adverse drug reactions are hypersensitivity. Other than these ADRs, gingival overgrowth or gum hyperplasia is also included in both categories [3]. There is broad inter-individual variations in PHT metabolism which depends on patient’s age, sex, genetic profile, ethnicity, hepatic, and renal functions. Thus, it is not possible to foretell whether a patient will experience PHT associated side effects or not. To overcome this problem, therapeutic drug monitoring (TDM) is recommended in the patients to avoid toxicity [4]. PHT is metabolized mainly by CYP2C9 (90%) and to a lesser extent by CYP2C19 (10%). Genetic polymorphisms of these genes are associated with ADRs by decreasing metabolism therefore, increasing the concentration of PHT in the blood. Mainly alleles 2 and 3 of genes CYP2C9 and CYP2C19 are involved in the toxicity of PHT and allele 2 of gene CYP2C9 is involved in idiosyncratic drug reaction related with PHT in epilepsy [5]. Even HLA-B*1502 is also present in these type of idiosyncratic drug reactions. Some studies showed that HLA-B*1502 is present in CBZ induced-SJS-TEN (Stevens-Johnson Syndrome- Toxic Epidermal Necrolysis) patients but not PHT-induced, the worst form of idiosyncratic drug reactions in which almost 10 - 30% of the skin is removed due to ADRs. Some studies showed that PHT induced IDRs can be because of HLA-B*1502 and HLA-A*3101 [6].
Copyright: © 2018 Vivek Kumar Garg., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

PubMed Indexed Article


EC Pharmacology and Toxicology
LC-UV-MS and MS/MS Characterize Glutathione Reactivity with Different Isomers (2,2' and 2,4' vs. 4,4') of Methylene Diphenyl-Diisocyanate.

PMID: 31143884 [PubMed]

PMCID: PMC6536005


EC Pharmacology and Toxicology
Alzheimer's Pathogenesis, Metal-Mediated Redox Stress, and Potential Nanotheranostics.

PMID: 31565701 [PubMed]

PMCID: PMC6764777


EC Neurology
Differences in Rate of Cognitive Decline and Caregiver Burden between Alzheimer's Disease and Vascular Dementia: a Retrospective Study.

PMID: 27747317 [PubMed]

PMCID: PMC5065347


EC Pharmacology and Toxicology
Will Blockchain Technology Transform Healthcare and Biomedical Sciences?

PMID: 31460519 [PubMed]

PMCID: PMC6711478


EC Pharmacology and Toxicology
Is it a Prime Time for AI-powered Virtual Drug Screening?

PMID: 30215059 [PubMed]

PMCID: PMC6133253


EC Psychology and Psychiatry
Analysis of Evidence for the Combination of Pro-dopamine Regulator (KB220PAM) and Naltrexone to Prevent Opioid Use Disorder Relapse.

PMID: 30417173 [PubMed]

PMCID: PMC6226033


EC Anaesthesia
Arrest Under Anesthesia - What was the Culprit? A Case Report.

PMID: 30264037 [PubMed]

PMCID: PMC6155992


EC Orthopaedics
Distraction Implantation. A New Technique in Total Joint Arthroplasty and Direct Skeletal Attachment.

PMID: 30198026 [PubMed]

PMCID: PMC6124505


EC Pulmonology and Respiratory Medicine
Prevalence and factors associated with self-reported chronic obstructive pulmonary disease among adults aged 40-79: the National Health and Nutrition Examination Survey (NHANES) 2007-2012.

PMID: 30294723 [PubMed]

PMCID: PMC6169793


EC Dental Science
Important Dental Fiber-Reinforced Composite Molding Compound Breakthroughs

PMID: 29285526 [PubMed]

PMCID: PMC5743211


EC Microbiology
Prevalence of Intestinal Parasites Among HIV Infected and HIV Uninfected Patients Treated at the 1o De Maio Health Centre in Maputo, Mozambique

PMID: 29911204 [PubMed]

PMCID: PMC5999047


EC Microbiology
Macrophages and the Viral Dissemination Super Highway

PMID: 26949751 [PubMed]

PMCID: PMC4774560


EC Microbiology
The Microbiome, Antibiotics, and Health of the Pediatric Population.

PMID: 27390782 [PubMed]

PMCID: PMC4933318


EC Microbiology
Reactive Oxygen Species in HIV Infection

PMID: 28580453 [PubMed]

PMCID: PMC5450819


EC Microbiology
A Review of the CD4 T Cell Contribution to Lung Infection, Inflammation and Repair with a Focus on Wheeze and Asthma in the Pediatric Population

PMID: 26280024 [PubMed]

PMCID: PMC4533840


EC Neurology
Identifying Key Symptoms Differentiating Myalgic Encephalomyelitis and Chronic Fatigue Syndrome from Multiple Sclerosis

PMID: 28066845 [PubMed]

PMCID: PMC5214344


EC Pharmacology and Toxicology
Paradigm Shift is the Normal State of Pharmacology

PMID: 28936490 [PubMed]

PMCID: PMC5604476


EC Neurology
Examining those Meeting IOM Criteria Versus IOM Plus Fibromyalgia

PMID: 28713879 [PubMed]

PMCID: PMC5510658


EC Neurology
Unilateral Frontosphenoid Craniosynostosis: Case Report and a Review of the Literature

PMID: 28133641 [PubMed]

PMCID: PMC5267489


EC Ophthalmology
OCT-Angiography for Non-Invasive Monitoring of Neuronal and Vascular Structure in Mouse Retina: Implication for Characterization of Retinal Neurovascular Coupling

PMID: 29333536 [PubMed]

PMCID: PMC5766278


EC Neurology
Longer Duration of Downslope Treadmill Walking Induces Depression of H-Reflexes Measured during Standing and Walking.

PMID: 31032493 [PubMed]

PMCID: PMC6483108


EC Microbiology
Onchocerciasis in Mozambique: An Unknown Condition for Health Professionals.

PMID: 30957099 [PubMed]

PMCID: PMC6448571


EC Nutrition
Food Insecurity among Households with and without Podoconiosis in East and West Gojjam, Ethiopia.

PMID: 30101228 [PubMed]

PMCID: PMC6086333


EC Ophthalmology
REVIEW. +2 to +3 D. Reading Glasses to Prevent Myopia.

PMID: 31080964 [PubMed]

PMCID: PMC6508883


EC Gynaecology
Biomechanical Mapping of the Female Pelvic Floor: Uterine Prolapse Versus Normal Conditions.

PMID: 31093608 [PubMed]

PMCID: PMC6513001


EC Dental Science
Fiber-Reinforced Composites: A Breakthrough in Practical Clinical Applications with Advanced Wear Resistance for Dental Materials.

PMID: 31552397 [PubMed]

PMCID: PMC6758937


EC Microbiology
Neurocysticercosis in Child Bearing Women: An Overlooked Condition in Mozambique and a Potentially Missed Diagnosis in Women Presenting with Eclampsia.

PMID: 31681909 [PubMed]

PMCID: PMC6824723


EC Microbiology
Molecular Detection of Leptospira spp. in Rodents Trapped in the Mozambique Island City, Nampula Province, Mozambique.

PMID: 31681910 [PubMed]

PMCID: PMC6824726


EC Neurology
Endoplasmic Reticulum-Mitochondrial Cross-Talk in Neurodegenerative and Eye Diseases.

PMID: 31528859 [PubMed]

PMCID: PMC6746603


EC Psychology and Psychiatry
Can Chronic Consumption of Caffeine by Increasing D2/D3 Receptors Offer Benefit to Carriers of the DRD2 A1 Allele in Cocaine Abuse?

PMID: 31276119 [PubMed]

PMCID: PMC6604646


EC Anaesthesia
Real Time Locating Systems and sustainability of Perioperative Efficiency of Anesthesiologists.

PMID: 31406965 [PubMed]

PMCID: PMC6690616


EC Pharmacology and Toxicology
A Pilot STEM Curriculum Designed to Teach High School Students Concepts in Biochemical Engineering and Pharmacology.

PMID: 31517314 [PubMed]

PMCID: PMC6741290


EC Pharmacology and Toxicology
Toxic Mechanisms Underlying Motor Activity Changes Induced by a Mixture of Lead, Arsenic and Manganese.

PMID: 31633124 [PubMed]

PMCID: PMC6800226


EC Neurology
Research Volunteers' Attitudes Toward Chronic Fatigue Syndrome and Myalgic Encephalomyelitis.

PMID: 29662969 [PubMed]

PMCID: PMC5898812


EC Pharmacology and Toxicology
Hyperbaric Oxygen Therapy for Alzheimer's Disease.

PMID: 30215058 [PubMed]

PMCID: PMC6133268


News and Events


August Issue Release

We always feel pleasure to share our updates with you all. Here, notifying you that we have successfully released the August issue of respective journals and can be viewed in the current issue pages.

Submission Deadline for September Issue

Ecronicon delightfully welcomes all the authors around the globe for effective collaboration with an article submission for the September issue of respective journals. Submissions are accepted on/before August 15, 2020.

Certificate of Publication

Ecronicon honors with a "Publication Certificate" to the corresponding author by including the names of co-authors as a token of appreciation for publishing the work with our respective journals.

Best Article of the Issue

Editors of respective journals will always be very much interested in electing one Best Article after each issue release. The authors of the selected article will be honored with a "Best Article of the Issue" certificate.

Certifying for Review

Ecronicon certifies the Editors for their first review done towards the assigned article of the respective journals.

Latest Articles

The latest articles will be updated immediately on the articles in press page of the respective journals.

Immediate Assistance

The prime motto of this team is to clarify all the queries without any delay or hesitation to avoid the inconvenience. For immediate assistance on your queries please don't hesitate to drop an email to editor@ecronicon.uk