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Shire Receives European Approval for INTUNIV®? (Guanfacine Hydrochloride Prolonged Release Tablets) as a Non-stimulant ADHD Treatment for Children and Adolescents
Zug, Switzerland (ots/PRNewswire) - The first selective alpha-2A adrenergic receptor agonist licensed for the treatment of ADHD in the EU
Shire today announced that the European Commission granted Marketing Authorisation for once-daily, non-stimulant INTUNIV(R) (guanfacine hydrochloride prolonged release tablets) for the treatment of attention deficit hyperactivity disorder (ADHD) in children and adolescents 6 to 17 years old for whom stimulants are not suitable, not tolerated or have been shown to be ineffective. INTUNIV must be used as a part of a comprehensive ADHD treatment programme, typically including psychological, educational and social measures.
"The approval of INTUNIV marks a significant advance in the treatment of ADHD in children and adolescents in Europe. Previously, physicians had only one licensed non-stimulant option for these patients," said Perry Sternberg, Senior Vice President, Neuroscience Business Unit, Shire. "The importance of simply providing physicians with the ability to choose the non-stimulant option that may best suit the needs of their patients should not be overlooked, considering the complexities and different manifestations of the disorder in children and adolescents."
The European Commission decision to grant approval is based on data from three pivotal Phase 3 studies investigating the short- and long-term safety and efficacy of INTUNIV in children and adolescents with ADHD.-
The European Commission decision to grant Marketing Authorisation follows a positive opinion adopted by the Committee for Medicinal Products for Human Use (CHMP) in July 2015 and applies to all 28 EU member states and Iceland, Liechtenstein and Norway.
About ADHD in children and adolescents
ADHD is a common psychiatric disorder in children and adolescents- and is recognised by the World Health Organization (WHO). The core symptoms are inattention, hyperactivity and impulsivity. Worldwide, prevalence of ADHD is estimated to be between 5.29% and 7.1%, and just under 5% for children and adolescents (<18 years)., While the exact origin of ADHD is unknown, it is recognised that the disorder may be caused by the interplay between genetic and environmental factors.-
INTUNIV is indicated in the EU, Iceland, Liechtenstein and Norway as a non-stimulant for the treatment of ADHD in children and adolescents aged 6 to 17 years old for whom stimulants are not suitable, not tolerated or have been shown to be ineffective.
INTUNIV must be used as a part of a comprehensive ADHD treatment programme, typically including psychological, educational and social measures.
Guanfacine is a selective alpha-2A adrenergic receptor agonist in that it has 15-20 times higher affinity for this receptor subtype than for the alpha-2B or alpha-2C subtypes. Guanfacine is a non-stimulant. The mode of action of guanfacine in ADHD is not fully established. Preclinical research suggests guanfacine modulates signalling in the prefrontal cortex and basal ganglia through direct modification of synaptic noradrenalin transmission at the alpha 2- adrenergic receptors.
The effects of guanfacine in the treatment of ADHD have been examined in children and adolescents (6 to 17 years). Guanfacine showed significantly greater efficacy than placebo on symptoms of ADHD based upon investigator ratings on the ADHD Rating Scale (ADHD-RS).
INTUNIV is also licensed in the US and Canada. For more information on the product labelling in these markets, refer to the US Prescribing Information and the Canadian Product Monograph, respectively. In the US, generic versions of Intuniv for the treatment of ADHD are available.
INTUNIV safety information
Guidance for Use
Pre-treatment screening: A baseline evaluation needs to be conducted to identify patients at increased risk of somnolence and sedation, hypotension and bradycardia, QT-prolongation arrhythmia and weight increase/risk of obesity.
Monitoring: During dose titration, weekly monitoring for signs and symptoms of somnolence and sedation, hypotension and bradycardia should be performed. During the first year of treatment, the patient should be assessed at least every 3 months for signs and symptoms as during dose titration and for weight increase/risk of obesity.
The physician who elects to use Intuniv for extended periods (over 12 months) should re-evaluate the usefulness of Intuniv every 3 months for the first year and then at least yearly, and consider trial periods off medication to assess the patient's functioning without pharmacotherapy, preferably during times of school holidays.
Discontinuation: Patients/caregivers should be instructed not to discontinue Intuniv without consulting their physician. Blood pressure and pulse may increase following discontinuation of Intuniv. Individuals may have larger increases than reflected by the mean changes. Blood pressure and pulse should be monitored in all patients during dose downward titration and following discontinuation of Intuniv. Tapering Intuniv dosing during withdrawal is recommended to minimise these potential withdrawal effects.
Hypersensitivity to the active substance or to any of the excipients.
Special warnings and precautions for use
Caution is advised when treating patients with Intuniv who have a history of hypotension, bradycardia, syncope or a condition that may predispose them to syncope such as hypotension, orthostatic hypotension, bradycardia or dehydration, heart block or cardiovascular disease. Caution is also advised when treating patients with Intuniv who are being treated concomitantly with antihypertensives or other medicinal products that can reduce blood pressure or heart rate or increase the risk of syncope. Patients should be advised to drink plenty of fluid.
Guanfacine should be prescribed with caution in patients with a known history of QT prolongation, risk factors for torsade de pointes or who are taking medicinal products known to prolong the QT interval.
Intuniv may cause somnolence and sedation predominantly at the start of treatment. Before Intuniv is used with any other centrally active depressants the potential for additive sedative effects should be considered. Patients should not drink alcohol whilst taking Intuniv. Patients are advised against operating heavy equipment, driving or cycling until they know how they respond to treatment with Intuniv.
Patients with emergent suicidal ideation or behavior during treatment for ADHD should be evaluated immediately by their physician.
Children and adolescents treated with Intuniv may show an increase in their BMI. Therefore, monitoring of height, weight and BMI should be done prior to initiation of therapy and then every 3 months for the first year, taking into consideration clinical judgement. 6 monthly monitoring should follow thereafter, with more frequent monitoring following any dose adjustment.
Patients with rare hereditary problems of galactose intolerance, the lactase deficiency or glucose-galactose malabsorption should not take this medicinal product.
When Intuniv is used concomitantly with CYP3A4/5 inhibitors (e.g. ketoconazole, grapefruit juice) and inducers, plasma concentrations of guanfacine may be elevated or lowered, potentially affecting the efficacy and safety of Intuniv.
Side effects Very common (frequency greater than or equal to1/10): Somnolence, headache, abdominal pain and fatigue. Decreased appetite, depression, anxiety, affect lability, insomnia, middle insomnia, nightmare, sedation, dizziness, lethargy, bradycardia, hypotension, orthostatic Common hypotension, vomiting, diarrhoea, nausea, constipation, (greater than or abdominal/stomach discomfort, dry mouth, rash, enuresis, equal to1/100 to irritability, blood pressure decreased and weight <1/10): increased Hypersensitivity, agitation, hallucination, convulsion, syncope/loss of consciousness, dizziness postural, atrioventricular block first degree, tachycardia, sinus Uncommon arrhythmia, pallor, asthma, dyspepsia, pruritis, (greater than or pollakiuria, asthenia, chest pain, blood pressure equal to1/1000 to increased, heart rate decreased and alanine <1/100): aminotransferase increased.
Please consult the SPC for rare (greater than or equal to1/10000 to <1/1000) side effects with Intuniv.
NOTES TO EDITORS
Shire enables people with life-altering conditions to lead better lives.
Our strategy is to focus on developing and marketing innovative specialty medicines to meet significant unmet patient needs.
We provide treatments in Rare Diseases, Neuroscience, Gastrointestinal and Internal Medicine and we are developing treatments for symptomatic conditions treated by specialist physicians in other targeted therapeutic areas, such as Ophthalmics.
THE "SAFE HARBOR" STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995
Statements included in this announcement that are not historical facts are forward-looking statements. Such forward-looking statements involve a number of risks and uncertainties and are subject to change at any time. In the event such risks or uncertainties materialize, Shire's results could be materially adversely affected. The risks and uncertainties include, but are not limited to, that:
- Shire's products may not be a commercial success;
- product sales from ADDERALL XR(R) and INTUNIV(R) are subject to generic competition;
- the failure to obtain and maintain reimbursement, or an adequate level of reimbursement, by third-party payers in a timely manner for Shire's products may affect future revenues, financial condition and results of operations;
- Shire conducts its own manufacturing operations for certain of its products and is reliant on third party contract manufacturers to manufacture other products and to provide goods and services. Some of the Shire's products or ingredients are only available from a single approved source for manufacture. Any disruption to the supply chain for any of the Shire's products may result in Shire being unable to continue marketing or developing a product or may result in Shire being unable to do so on a commercially viable basis for some period of time;
- the manufacture of Shire's products is subject to extensive oversight by various regulatory agencies. Regulatory approvals or interventions associated with changes to manufacturing sites, ingredients or manufacturing processes could lead to significant delays, an increase in operating costs, lost product sales, an interruption of research activities or the delay of new product launches;
- Shire has a portfolio of products in various stages of research and development. The successful development of these products is highly uncertain and requires significant expenditures and time, and there is no guarantee that these products will receive regulatory approval;
- the actions of certain customers could affect Shire's ability to sell or market products profitably. Fluctuations in buying or distribution patterns by such customers can adversely affect Shire's revenues, financial conditions or results of operations;
- investigations or enforcement action by regulatory authorities or law enforcement agencies relating to Shire's activities in the highly regulated markets in which it operates may result in significant legal costs and the payment of substantial compensation or fines;
- adverse outcomes in legal matters and other disputes, including Shire's ability to enforce and defend patents and other intellectual property rights required for its business, could have a material adverse effect on Shire's revenues, financial condition or results of operations;
- Shire faces intense competition for highly qualified personnel from other companies and organizations. Shire is undergoing a corporate reorganization and was the subject of an unsuccessful acquisition proposal and the consequent uncertainty could adversely affect Shire's ability to attract and/or retain the highly skilled personnel needed for Shire to meet its strategic objectives;
- failure to achieve Shire's strategic objectives with respect to the acquisition of NPS Pharmaceuticals, Inc. may adversely affect Shire's financial condition and results of operations;
and other risks and uncertainties detailed from time to time in Shire's filings with the US Securities and Exchange Commission, including its most recent Annual Report on Form 10-K.
1) Intuniv Summary of Product Characteristics. Shire Pharmaceuticals Ireland Limited. 2015. 2) HERVAS A, et al. (2014) Efficacy and safety of extended-release guanfacine hydrochloride in children and adolescents with attention-deficit/hyperactivity disorder: a randomized, controlled, phase III trial. Eur Neuropsychopharmacol. 24:1861-72. 3) NEWCORN JH, et al. (2014) Long-term maintenance of efficacy of extended-release guanfacine hydrochloride (GXR) in children and adolescents with attention-deficit/hyperactivity disorder (ADHD): double-blind, placebo-controlled, multicentre, phase 3, randomized withdrawal study. Poster presented at the 22nd European Congress of Psychiatry; Munich, Germany. 4) WILENS TE, et al. (2014) A multicentre, placebo-controlled trial of guanfacine extended release in adolescents with attention-deficit/hyperactivity disorder. Poster presented at the 3rd EUNETHYDIS International Conference on ADHD; Istanbul, Turkey. 5) POLANCZYK G, et al. (2007) The worldwide prevalence of ADHD: a systematic review and metaregression analysis. Am J Psychiatry. 164:942-8. 6) WILLCUTT EG. (2012) The prevalence of DSM-IV attention-deficit/hyperactivity disorder: a meta-analytic review. Neurotherapeutics. 2012;9:490-9. 7) American Psychiatric Association. (2013) Diagnostic and statistical manual of mental disorders: DSM-5 (5th ed.). Arlington, VA: American Psychiatric Publishing. 8) International Classification of Diseases, 10th ed. (ICD-10). World Health Organization 2007. Chapter 5, F90. Available at: http://apps.who.int/classifications/icd10/browse/2010/en#/F90-F98 Last accessed September 2015. 9) LANGLEY K, et al. (2007) Effects of Low Birth Weight, Maternal Smoking in Pregnancy and Social Class on the Phenotypic Manifestation of Attention Deficit Hyperactivity Disorder and Associated Antisocial Behaviour: Investigation in a Clinical Sample. BMC Psychiatry. 7:26. 10) FARAONE S, et al. (2005) Molecular Genetics of Attention Deficit Hyperactivity Disorder. BioPsych 57:1313-1323. 11) NIGG J, et al. (2010) Measured Gene-by-environment Interaction in Relation to Attention-deficit/Hyperactivity Disorder. J Am Acad Child Adolesc Psychiatry. 49:863-873.
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