$OREX news Orexigen Announces South Korean Appro
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Orexigen Announces South Korean Approval of Contrave(R) (naltrexone HCI and bupropion HCI Extended-Release) Monotherapy for Weight Management in Overweight or Obese Adult Patients
3 minutes ago - DJNF
Orexigen has shipped the first order of Contrave tablets to partner Kwang Dong in anticipation of a commercial launch later this quarter
SAN DIEGO, May 2, 2016 /PRNewswire/ -- Orexigen Therapeutics, Inc. (Nasdaq: OREX) today announced that the Korean Ministry of Food and Drug Safety (MFDS) has approved Contrave(R) (naltrexone HCI and bupropion HCI extended release) monotherapy for weight management in overweight or obese adult patients. In anticipation of a commercial launch this quarter, Orexigen has shipped an initial order of Contrave tablets to Kwang Dong Pharmaceutical Company, Ltd., the Company's partner for South Korea. This shipment and a subsequent firm order from Kwang Dong for later in 2016 have a combined value to Orexigen of approximately $5.9 million.
"The market for anti-obesity medicines is growing rapidly in South Korea as obesity and related comorbidities are increasingly recognized as a serious health problem there," said Michael Narachi, CEO of Orexigen. "With well established relationships with obesity societies and opinion leaders, Kwang Dong is an ideal partner for Contrave, and we look forward to working with them closely to ensure a successful commercial launch."
Obesity and related comorbidities are a serious health problem in South Korea, where approximately 38% of men and 26% of women are obese according to recent statistics from the National Health Institute. In 2015, sales of anti-obesity medicines exceeded $71 million in Korea, a 21% increase over the prior year.
Under the terms of the previously announced South Korea distributorship agreement, Kwang Dong will be responsible for all commercialization activity and expenses. Orexigen will supply Contrave tablets to Kwang Dong in exchange for a $7 million payment received in 2015, approximately 35 -- 40% of net sales, potential sales-based milestone payments, and other fees.
About Kwang Dong
Kwang Dong Pharmaceutical Co., headquartered in Seoul, was established in 1963. The company reported approximately $498 million in net sales in 2015. Kwang Dong has more than 500 sales representatives in Korea. The company's product portfolio includes pharmaceutical products and health foods.
About CONTRAVE
CONTRAVE, approved by the United States Food and Drug Administration in September 2014, is indicated for use as an adjunct to a reduced-calorie diet and increased physical activity for chronic weight management in adults with an initial body mass index (BMI) of 30 kg/m(2) or greater (obese), or 27 kg/m(2) or greater (overweight) in the presence of at least one weight-related comorbid condition (e.g., hypertension, type 2 diabetes mellitus or dyslipidemia). In Europe, the drug was approved in March 2015 under the brand name Mysimba(R) (naltrexone HCl / bupropion HCl prolonged release).
The exact neurochemical effects of CONTRAVE leading to weight loss are not fully understood. CONTRAVE has two components: naltrexone, an opioid antagonist, and bupropion, a relatively weak inhibitor of the neuronal reuptake of dopamine and norepinephrine. Nonclinical studies suggest that naltrexone and bupropion have effects on two separate areas of the brain involved in the regulation of food intake: the hypothalamus (appetite regulatory center) and the mesolimbic dopamine circuit (reward system).
Four 56-week multicenter, double-blind, placebo-controlled Phase 3 clinical trials were conducted to evaluate the effect of CONTRAVE in conjunction with lifestyle modification in 4,536 subjects randomized to CONTRAVE or placebo. In these studies, the most common adverse reactions (>5 percent) seen in patients taking CONTRAVE included nausea, constipation, headache, vomiting, dizziness, insomnia, dry mouth, and diarrhea.
Important Safety Information
WARNING: SUICIDAL THOUGHTS AND BEHAVIORS; AND NEUROPSYCHIATRIC REACTIONS
Suicidality and Antidepressant Drugs
CONTRAVE is not approved for use in the treatment of major depressive disorder or other psychiatric disorders. CONTRAVE contains bupropion, the same active ingredient as some other antidepressant medications (including, but not limited to, WELLBUTRIN, WELLBUTRIN SR, WELLBUTRIN XL, and APLENZIN). Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term trials. These trials did not show an increase in the risk of suicidal thoughts and behavior with antidepressant use in subjects over age 24; there was a reduction in risk with antidepressant use in subjects aged 65 and older. In patients of all ages who are started on CONTRAVE, monitor closely for worsening, and for the emergence of suicidal thoughts and behaviors. Advise families and caregivers of the need for close observation and communication with the prescriber. CONTRAVE is not approved for use in pediatric patients.
Neuropsychiatric Reactions in Patients Taking Bupropion for Smoking Cessation
Serious neuropsychiatric reactions have occurred in patients taking bupropion for smoking cessation. The majority of these reactions occurred during bupropion treatment, but some occurred in the context of discontinuing treatment. In many cases, a causal relationship to bupropion treatment is not certain, because depressed mood may be a symptom of nicotine withdrawal. However, some of the cases occurred in patients taking bupropion who continued to smoke. Although CONTRAVE is not approved for smoking cessation, observe all patients for neuropsychiatric reactions. Instruct the patient to contact a healthcare provider if such reactions occur.
Contraindications
CONTRAVE is contraindicated in: uncontrolled hypertension; seizure disorder or a history of seizures; use of other bupropion-containing products; bulimia or anorexia nervosa, which increase the risk for seizure; chronic opioid or opiate agonist (eg, methadone) or partial agonists (eg, buprenorphine) use, or acute opiate withdrawal; patients undergoing an abrupt discontinuation of alcohol, benzodiazepines, barbiturates, and antiepileptic drugs; use during/within 14 days following treatment with monoamine oxidase inhibitors (MAOIs)--there is an increased risk of hypertensive reactions when CONTRAVE is used concomitantly with MAOIs and use with reversible MAOIs such as linezolid or intravenous methylene blue is also contraindicated; known allergy to any component of CONTRAVE anaphylactoid/anaphylactic reactions and Stevens-Johnson syndrome have been reported; pregnancy.
WARNINGS AND PRECAUTIONS
Suicidal Behavior and Ideation
All patients being treated with antidepressants for any indication should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the initial few months of a course of drug therapy, or at times of dose changes, either increases or decreases. This warning applies to CONTRAVE because one of its components, bupropion, is a member of an antidepressant class.
Consideration should be given to changing the therapeutic regimen, including possibly discontinuing the medication, in patients whose depression is persistently worse, or who are experiencing emergent suicidality or symptoms that might be precursors to worsening depression or suicidality, especially if these symptoms are severe, abrupt in onset, or were not part of the patient's presenting symptoms.
Families and caregivers of patients being treated with antidepressants for major depressive disorder or other indications, both psychiatric and nonpsychiatric, should be alerted about the need to monitor patients for the emergence of anxiety, agitation, irritability, unusual changes in behavior, and other symptoms, as well as the emergence of suicidality, and to report such symptoms immediately to healthcare providers. Such monitoring should include daily observation by families and caregivers. Prescriptions for CONTRAVE should be written for the smallest quantity of tablets consistent with good patient management, in order to reduce the risk of overdose.
Neuropsychiatric Symptoms and Suicide Risk in Smoking Cessation Treatment
CONTRAVE is not approved for smoking cessation treatment, but serious neuropsychiatric symptoms have been reported in patients taking bupropion for smoking cessation. These have included changes in mood (including depression and mania), psychosis, hallucinations, paranoia, delusions, homicidal ideation, hostility, agitation, aggression, anxiety, and panic, as well as suicidal ideation, suicide attempt, and completed suicide. Observe patients for the occurrence of neuropsychiatric reactions. Instruct patients to contact a healthcare professional if such reactions occur.
Seizures
CONTRAVE can cause seizures. The risk of seizure is dose-related. Discontinue treatment and do not restart CONTRAVE in patients who experience a seizure. Caution should be used when prescribing CONTRAVE to patients with predisposing factors that may increase the risk of seizure, including: history of head trauma or prior seizure, severe stroke, arteriovenous malformation, central nervous system tumor or infection, or metabolic disorders (eg, hypoglycemia, hyponatremia, severe hepatic impairment, and hypoxia); excessive use of alcohol or sedatives, addiction to cocaine or stimulants, or withdrawal from sedatives; patients with diabetes treated with insulin and/or oral diabetic medications (sulfonylureas and meglitinides) that may cause hypoglycemia; concomitant administration of medications that may lower the seizure threshold, including other bupropion products, antipsychotics, tricyclic antidepressants, theophylline, systemic steroids.
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