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methylphenidate adhd

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https://www.readbyqxmd.com/read/28938219/age-dependent-effects-of-acute-methylphenidate-on-amygdala-reactivity-in-stimulant-treatment-naive-patients-with-attention-deficit-hyperactivity-disorder
#1
Marco A Bottelier, Anouk Schrantee, Bart Ferguson, Hyke G H Tamminga, Cheima Bouziane, J J Sandra Kooij, Michiel B de Ruiter, Liesbeth Reneman
In the present study, we investigate whether methylphenidate (MPH) affects emotional processing and whether this effect is modulated by age. We measured amygdala reactivity with functional Magnetic Resonance Imaging (fMRI) during processing of angry and fearful facial expressions in male stimulant treatment-naive patients with ADHD (N = 35 boys; N = 46 men) and 23 healthy control subjects (N = 11 boys; N = 12 men). In ADHD patients, we also measured amygdala reactivity 90min after an acute oral challenge with MPH (0...
September 12, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28935267/methylphenidate-doses-in-attention-deficit-hyperactivity-disorder-and-comorbid-substance-use-disorders
#2
Charlotte Skoglund, Lena Brandt, Brian D'Onofrio, Henrik Larsson, Johan Franck
Patients with Attention Deficit/Hyperactivity Disorder (ADHD) and comorbid Substance Use Disorders (SUD) are increasingly being treated with central stimulant medication despite limited evidence for its effectiveness. Lack of longitudinal follow-up studies of dosing and adverse effects has resulted in conflicting treatment guidelines. This study aims to explore whether individuals with ADHD and comorbid SUD are treated with higher stimulant doses than individuals with ADHD only, and whether doses increase over time as a sign of tolerance, a core symptom of addiction...
September 18, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28925314/effect-of-methylphenidate-on-visual-responses-in-the-superior-colliculus-in-the-anaesthetised-rat-role-of-cortical-activation
#3
L Hetherington, E J Dommett, A C Turner, T B Riley, J X Haensel, P G Overton
The mechanism of action of psychostimulant drugs in the treatment of Attention Deficit Hyperactivity Disorder is still largely unknown, although recent evidence suggests one possibility is that the drugs affect the superior colliculus (SC). We have previously demonstrated that systemically administered d-amphetamine attenuates/abolishes visual responses to wholefield light flashes in the superficial layers of the SC in anaesthetised rats, and the present study sought to extend this work to methylphenidate (MPH)...
September 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28899641/attention-deficit-hyperactivity-disorder-medication-use-in-adolescents-the-patient-s-perspective
#4
Richelle C Kosse, Marcel L Bouvy, Daphne Philbert, Tjalling W de Vries, Ellen S Koster
PURPOSE: The purpose of the study was to gain more insight into the attitudes of adolescents using medication for attention-deficit/hyperactivity disorder (ADHD). METHODS: A cross-sectional study among adolescents (aged 12-18 years) who filled at least two prescriptions for ADHD medication in the preceding year was conducted. Adolescents were invited to fill in an online questionnaire containing questions on sociodemographics, health status, illness perceptions, medication adherence, and medication beliefs...
September 9, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28885224/impaired-reproduction-after-exposure-to-adhd-drugs-systematic-review-of-animal-studies
#5
Pia Brandt Danborg, Anders Lykkemark Simonsen, Peter C Gøtzsche
BACKGROUND: Few studies have reported on long-term harms caused by ADHD drugs but they are known to impair growth. OBJECTIVE: To assess whether ADHD drugs impair reproduction in mammals. METHODS: Systematic review of reproduction in studies of animals treated with ADHD drugs. DATA SOURCES: PubMed, Biosis and EMBASE. RESULTS: We included 17 studies. The studies were generally of poor quality or poorly reported...
2017: International Journal of Risk & Safety in Medicine
https://www.readbyqxmd.com/read/28871191/pharmacogenetics-of-methylphenidate-in-childhood-attention-deficit-hyperactivity-disorder-long-term-effects
#6
Clara I Gomez-Sanchez, Juan J Carballo, Rosa Riveiro-Alvarez, Victor Soto-Insuga, Maria Rodrigo, Ignacio Mahillo-Fernandez, Francisco Abad-Santos, Rafael Dal-Ré, Carmen Ayuso
Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder in which a significant proportion of patients do not respond to treatment. The objective of this study was to examine the role of genetic risk variants in the response to treatment with methylphenidate (MPH). The effectiveness of MPH was evaluated based on variations in the CGI-S and CGAS scales over a 12-month treatment period using linear mixed effects models. A total of 208 ADHD patients and 34 polymorphisms were included in the analysis...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28868642/assessing-risk-of-bias-in-randomized-controlled-trials-of-methylphenidate-for-children-and-adolescents-with-attention-deficit-hyperactivity-disorder-adhd
#7
Raíssa Rodrigues-Tartari, Walter Swardfager, Giovanni A Salum, Luís A Rohde, Hugo Cogo-Moreira
To test how reliable the tool recommend by Cochrane Collaboration for assessing risk of bias systematic reviews of randomized clinical trials is in the context of methylphenidate for children and adolescents with attention deficit hyperactivity disorder. Confirmatory factor analysis was used to evaluate a unidimensional model for the 7 indicators, applied to 184 Randomized Clinical Trial (RCTs) within a 2015 Cochrane systematic review titled "Methylphenidate for children and adolescents with attention deficit hyperactivity disorder...
September 4, 2017: International Journal of Methods in Psychiatric Research
https://www.readbyqxmd.com/read/28861338/increased-default-mode-variability-is-related-to-reduced-task-performance-and-is-evident-in-adults-with-adhd
#8
Athanasia M Mowinckel, Dag Alnæs, Mads L Pedersen, Sigurd Ziegler, Mats Fredriksen, Tobias Kaufmann, Edmund Sonuga-Barke, Tor Endestad, Lars T Westlye, Guido Biele
Insufficient suppression and connectivity of the default mode network (DMN) is a potential mediator of cognitive dysfunctions across various disorders, including attention deficit/hyperactivity disorder (ADHD). However, it remains unclear if alterations in sustained DMN suppression, variability and connectivity during prolonged cognitive engagement are implicated in adult ADHD pathophysiology, and to which degree methylphenidate (MPH) remediates any DMN abnormalities. This randomized, double-blinded, placebo-controlled, cross-over clinical trial of MPH (clinicaltrials...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28856464/dosage-of-methylphenidate-and-traumatic-brain-injury-in-adhd-a-population-based-study-in-taiwan
#9
Yin-To Liao, Yao-Hsu Yang, Ting-Yu Kuo, Hsin-Yi Liang, Kuo-You Huang, Tsu-Nai Wang, Yena Lee, Roger S McIntyre, Vincent Chin-Hung Chen
Preventive effect of stimulants on the risk of brain injuries had been reported. The aim of this study is to determine the extent to which methylphenidate (MPH) prescription moderates the risk of traumatic brain injuries (TBI) in individuals with attention-deficit/hyperactivity disorder (ADHD). Individuals with a recent diagnosis of ADHD between January 1997 and December 2013 (n = 163,618) were identified from Taiwan's National Health Insurance Research Database. A total of 124,438 adolescents and children with ADHD and without prior TBI diagnoses were included and evaluated for subsequent TBI...
August 30, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28855123/biotransformation-of-ritalinic-acid-by-laccase-in-the-presence-of-mediator-tempo
#10
Aza Kobakhidze, Vladimir Elisashvili, Philippe F-X Corvini, Monika Čvančarová
Methylphenidate is widely used as a medication for the treatment of attention deficit hyperactivity disorder (ADHD) in children. Less than 1% of methylphenidate is excreted unchanged in urine, while 80% of an oral dose is excreted as ritalinic acid (which is reportedly poorly degradable). This study aims to investigate the biotransformation of ritalinic acid by free and immobilized enzymes. The influence of various laccase mediators on biotransformation efficiency has been tested. Formation of the main transformation products has been monitored and their potential structures suggested...
August 27, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28837827/pharmacotherapy-of-emotional-dysregulation-in-adults-with-adhd-a-systematic-review-and-meta-analysis
#11
REVIEW
Francesca Lenzi, Samuele Cortese, Joseph Harris, Gabriele Masi
Emotional dysregulation (ED) is a dysfunction in modifying an emotional state in an adaptive and goal oriented way, with excitability, ease anger, and mood lability. It is present in up to 70% of adults with ADHD, regardless of other comorbidities, and substantially worsens the psychosocial outcomes of the disorder. Besides fronto-parietal circuits mediating top-down control, brain regions involved in bottom-up processes (e.g., amygdala, orbitofrontal cortex, and ventral striatum) are implicated in ED. We performed a systematic review/meta-analysis of double-blind randomized controlled trials of ADHD medications to assess their effects on ED in adults with ADHD...
August 25, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28836895/correlations-between-clinical-trial-outcomes-based-on-symptoms-functional-impairments-and-quality-of-life-in-children-and-adolescents-with-adhd
#12
David R Coghill, Alain Joseph, Vanja Sikirica, Mark Kosinski, Caleb Bliss, Michael Huss
OBJECTIVE: To assess relationships between treatment-associated changes in measures of ADHD symptoms, functional impairments, and health-related quality of life in children and adolescents with ADHD. METHOD: Pearson correlation coefficients were calculated post hoc for changes from baseline to endpoint in outcomes of one randomized, placebo- and active-controlled trial of lisdexamfetamine (osmotic-release methylphenidate reference) and one of guanfacine extended-release (atomoxetine reference)...
August 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28817309/weight-height-and-body-mass-index-in-patients-with-attention-deficit-hyperactivity-disorder-treated-with-methylphenidate
#13
Azucena Díez-Suárez, María Vallejo-Valdivielso, Juan J Marín-Méndez, Pilar de Castro-Manglano, César A Soutullo
OBJECTIVE: To describe the methylphenidate (MPH) effects on weight, height, and body mass index (BMI) in a Spanish sample diagnosed with attention-deficit/hyperactivity disorder (ADHD). METHODS: Patients (6-18 years) diagnosed with ADHD treated at our Unit with MPH in the last 10 years were included in an observational longitudinal study. Weight, height, and BMI Z scores were measured at baseline and at last follow-up. RESULTS: Three hundred forty-two patients (mean [standard deviation] age: 10...
August 17, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28816913/influence-of-written-informed-consent-for-methylphenidate-on-medicine-persistence-rates-in-children-with-attention-deficit-hyperactivity-disorder
#14
Kristian Naenen-Hernani, Antonio Palazón-Bru, Francisco Colomina-Climent, Vicente F Gil-Guillén
OBJECTIVE: To assess the influence of written informed consent on nonpersistence with methylphenidate treatment in children with attention-deficit hyperactivity disorder (ADHD). METHODS: We undertook a cohort study including 141 children with ADHD who started treatment with methylphenidate, with a follow-up of 6 months. The main outcome variable was nonpersistence, defined as discontinuation of treatment by the patient. Two groups were analyzed with and without written informed consent...
August 9, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28811624/pupil-size-tracks-attentional-performance-in-attention-deficit-hyperactivity-disorder
#15
G Wainstein, D Rojas-Líbano, N A Crossley, X Carrasco, F Aboitiz, T Ossandón
Attention-deficit/hyperactivity disorder (ADHD) diagnosis is based on reported symptoms, which carries the potential risk of over- or under-diagnosis. A biological marker that helps to objectively define the disorder, providing information about its pathophysiology, is needed. A promising marker of cognitive states in humans is pupil size, which reflects the activity of an 'arousal' network, related to the norepinephrine system. We monitored pupil size from ADHD and control subjects, during a visuo-spatial working memory task...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807495/the-colorful-spectrum-of-tourette-syndrome-and-its-medical-surgical-and-behavioral-therapies
#16
Jan Roth
Tourette syndrome (TS) is a common neuropsychiatric disorder, more common in males than females, with onset before age 18. TS is characterized by multiple motor tics and one or more vocal/phonic tics, persisting for more than a year. Tics are unvoluntary, abrupt, rapid, repetitive, but non-rhythmic movements or sounds (vocalizations). They are preceded by an inner urge. Tics can be temporarily suppressed, but this leads to a powerful re-emergence. The performance of tics results in immediate but transient relief...
August 10, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28806385/a-naturalistic-comparison-of-methylphenidate-and-risperidone-monotherapy-in-drug-naive-youth-with-attention-deficit-hyperactivity-disorder-comorbid-with-oppositional-defiant-disorder-and-aggression
#17
Gabriele Masi, Azzurra Manfredi, Giulia Nieri, Pietro Muratori, Chiara Pfanner, Annarita Milone
BACKGROUND/PURPOSE: Attention-deficit/hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD) are frequently co-occurring in youth, but data about the pharmacological management of this comorbidity are scarce, especially when impulsive aggression is prominent. Although stimulants are the first-line medication for ADHD, second-generation antipsychotics, namely, risperidone, are frequently used. We aimed to assess effectiveness and safety of monotherapy with the stimulant methylphenidate (MPH) and risperidone in a consecutive sample of 40 drug-naive male youths diagnosed as having ADHD-combined presentation, comorbid with ODD and aggression, without psychiatric comorbidities, according to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria and a structured clinical interview (Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version)...
August 10, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28800281/attentional-lapses-in-attention-deficit-hyperactivity-disorder-blank-rather-than-wandering-thoughts
#18
Charlotte Van den Driessche, Mikaël Bastian, Hugo Peyre, Coline Stordeur, Éric Acquaviva, Sara Bahadori, Richard Delorme, Jérôme Sackur
People with attention-deficit/hyperactivity disorder (ADHD) have difficulties sustaining their attention on external tasks. Such attentional lapses have often been characterized as the simple opposite of external sustained attention, but the different types of attentional lapses, and the subjective experiences to which they correspond, remain unspecified. In this study, we showed that unmedicated children (ages 6-12) with ADHD, when probed during a standard go/no-go task, reported more mind blanking (a mental state characterized by the absence of reportable content) than did control participants...
August 1, 2017: Psychological Science
https://www.readbyqxmd.com/read/28791048/specific-central-nervous-system-medications-are-associated-with-temporomandibular-joint-symptoms
#19
John K Drisdale Iii, Monica G Thornhill, Alexandre R Vieira
AIMS: There is evidence of association between bruxism and the increasingly common central nervous system stimulants prescribed for attention deficit hyperactivity disorder (ADHD), as well as the selective serotonin reuptake inhibitors (SSRIs) often prescribed for depression or anxiety. However, the evidence is not clear on whether these medications inducing bruxism are directly associated with temporomandibular joint disorder (TMD). The aim of this work is to evaluate whether these medications are associated with TMD symptoms...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28774371/-effect-of-baicalin-on-behavioral-characteristics-of-rats-with-attention-deficit-hyperactivity-disorder
#20
Rong-Yi Zhou, Xin-Min Han, Jiao-Jiao Wang, Hai-Xia Yuan, Ji-Chao Sun, Yue You, Yu-Chen Song
OBJECTIVE: To investigate the effect of baicalin on the behavioral characteristics of rats with attention deficit hyperactivity disorder (ADHD), and to provide a basis for further research on baicalin in the treatment of ADHD. METHODS: A total of 40 SHR rats were randomly divided into model group, methylphenidate hydrochloride (MPH) group, and low-, medium-, and high-dose baicalin groups, with 8 rats in each group. Eight WKY rats were selected as normal control group...
August 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
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