Novel Panic Disorder Treatment HB-1 Enters Nationwide Clinical Trial in Australia
Key Insights
A nationwide clinical trial is underway in Australia testing HB-1, a novel combination therapy for panic disorder (search) that targets the body's central stress response system (search) rather than neurotransmitters (search).
The treatment combines two existing TGA-approved medications and aims to reduce physical symptoms like elevated heart rate and shaking without the side effects or addiction risks of current therapies.
The trial involves 20 sites across Australia and is recruiting participants aged 18-65 with diagnosed panic disorder (search), offering hope for the estimated 5% of Australians affected by this debilitating condition.
A groundbreaking clinical trial is currently underway across Australia to test HB-1, a novel combination therapy for panic disorder (search) that could revolutionize treatment for the estimated 5% of Australians who experience this debilitating anxiety condition during their lifetime. The nationwide study, conducted across 20 sites including the SAHMRI Clinical Trials Platform, represents the first potential new medication for panic disorder since 2003.
Targeting the Body's Stress Response System
Unlike current panic disorder (search) treatments that primarily act on neurotransmitters (search), HB-1 takes a fundamentally different approach by targeting the body's central stress response system (search). The experimental therapy combines two existing medications that have already received approval from the Therapeutic Goods Administration (TGA) for other medical conditions.
"What makes this treatment promising is that it targets the body's physiological stress system in a different way, which could allow for greater relief without the burden of side effects commonly experienced with medications currently on the market," said Dr. Fran Adams, General Practitioner and SAHMRI Principal Investigator.
The treatment aims to reduce the physical symptoms that characterize panic attacks, including elevated heart rate, shaking, and dizziness, potentially offering patients better symptom control with fewer adverse effects.
Addressing Critical Treatment Gaps
Panic disorder (search) affects approximately 4.7% of the US adult population and around 5% of Australians, making it one of the most common anxiety disorders. The condition is characterized by sudden and unpredictable panic attacks that can occur without any obvious trigger, often leaving sufferers feeling trapped and avoiding situations that might precipitate an episode.
"Panic disorder (search) can have a devastating impact on a person's quality of life, and many people find current medications either don't work well enough or cause intolerable side effects," Dr. Adams explained.
Current treatment options include selective serotonin reuptake inhibitors (SSRIs), which can worsen symptoms initially in around 15% of patients, and benzodiazepines (search) like alprazolam and clonazepam, which are typically limited to short-term use due to their potential for dependence and addiction.
Patient Perspectives and Trial Design
The impact of panic disorder (search) on daily life is profound, as illustrated by trial participant Toby Whittle, a 24-year-old Adelaide student teacher who experienced repeated panic attacks during COVID-19.
"Panic attacks really impacted my life in 2020. Back then it was like pretty much anything that would give me anxiety, would lead to a panic attack," Whittle said. "It feels like going into meltdown. Your body shakes like crazy, and you lose control of your breathing. I avoided a lot of things in life to try to protect against getting any anxiety and ending up having a panic attack."
The clinical trial is recruiting participants aged 18 to 65 who have been diagnosed with panic disorder (search) or experience regular panic attacks. The study design focuses on assessing both the tolerability and efficacy of HB-1 throughout the treatment period.
Research Innovation and Community Impact
The trial represents a significant advancement in panic disorder (search) research, particularly given the lack of new therapeutic options over the past two decades. Emma Heath, Senior Manager of the SAHMRI Clinical Trials Platform, emphasized the importance of community participation in advancing treatment options.
"As one of the trial sites, SAHMRI is proud to help connect South Australians to innovative research that has the potential to change how we treat this condition," Heath said. "It's through the generosity and courage of clinical trial participants that we can assist with making discoveries like this possible."
For patients like Whittle, the trial offers genuine hope for improved quality of life. "When you're having one of these episodes, all you want is to regain control. A medication that could help achieve that would be a step in the right direction," he noted.
The combination therapy's potential to provide effective symptom relief without the tolerance or dependence issues associated with current medications could represent a significant breakthrough for the millions of people worldwide who struggle with panic disorder (search).