Contrave is a prescription weight-loss medication that combines naltrexone and bupropion [1]. Its effectiveness is demonstrated by clinical trials showing that participants taking Contrave achieved greater weight loss compared to placebo [2][3].
How much weight can people lose with Contrave?
In a clinical trial, approximately 42% of participants taking Contrave lost at least 5% of their body weight after 56 weeks, while only about 19% of those taking a placebo achieved similar weight loss [2]. Another study indicated that about 35% of individuals on Contrave lost 5% or more of their baseline weight over a year, compared to 15% on placebo [3].
What are the ingredients in Contrave and how do they work?
Contrave contains two active ingredients: naltrexone and bupropion [1]. Naltrexone is an opioid antagonist, and bupropion is an antidepressant that also affects dopamine and norepinephrine [4]. The combination targets brain areas involved in appetite and food craving regulation [5]. Bupropion is thought to help reduce hunger and food cravings, while naltrexone helps to diminish the rewarding effect of food [5].
What are the potential side effects of Contrave?
Common side effects associated with Contrave can include nausea, constipation, headache, vomiting, dizziness, dry mouth, and diarrhea [1]. Less common but serious side effects can involve increased blood pressure, suicidal thoughts or behaviors, and seizures [1][6]. Individuals with certain medical conditions, such as uncontrolled high blood pressure, seizure disorders, or a history of eating disorders, should not take Contrave [1].
How long does it take to see results with Contrave?
The effectiveness of Contrave is typically assessed after a period of sustained use. Clinical trials have evaluated its impact over 56 weeks [2] or a year [3], indicating that significant weight loss can be achieved with consistent adherence to the medication and accompanying lifestyle changes.
What are the alternatives to Contrave for weight loss?
Other prescription weight-loss medications are available, including liraglutide (Saxenda), semaglutide (Wegovy), phentermine-topiramate (Qsymia), and orlistat (Xenical, Alli) [7]. Lifestyle interventions, such as dietary changes and increased physical activity, are also fundamental to weight management [8].
When does the patent for Contrave expire?
Information on specific patent expiry dates for Contrave may be available through resources like DrugPatentWatch.com [9]. Patent protection generally lasts for a set period, after which generic versions of the medication may become available.