1, 2, 6, 7, Rungta Institute of Pharmaceutical Sciences, Kohka Kurud, Bhilai
3,4,5,8 Rungta Institute of Pharmaceutical Sciences and Research, Bhilai, Chhattisgarh.
Anxiety and stress are prevalent psychological disorders that impact people's mental, emotional, and physical health.These situations are far more common in today's culture due to societal expectations, employment responsibilities, academic pressure, and lifestyle changes. Anxiety is defined as ongoing sensations of worry, fear, or uneasiness that may arise even in the absence of an imminent threat, whereas stress is the body's normal reaction to difficult or dangerous circumstances.Both stress and anxiety can have detrimental effects on sleep patterns, cardiovascular health, cognitive function, and general quality of life when they are experienced for extended periods of time.Stress and worry physiologically cause the hypothalamic-pituitary-adrenal (HPA) axis to become activated, which releases stress hormones including cortisol and adrenaline. Persistent activation of this system can result in immune system weakness, psychiatric issues, and an elevated risk of chronic illnesses. Lifestyle changes, psychological counseling, medication, and the use of herbal or natural therapies that support emotional equilibrium and relaxation are examples of management techniques.
Stress is now an unavoidable part of modern life, and it plays a major role in the emergence of chronic diseases, sleep difficulties, psychiatric disorders, and decreased productivity. The hypothalamic-pituitary-adrenal (HPA) axis is activated and cortisol release is increased by prolonged stress, which may have detrimental effects on immune system performance, emotional stability, and cognitive function. Despite the availability of traditional pharmaceutical treatments including antidepressants and anxiolytics, long-term use of these medications is frequently linked to side effects, dependency concerns, and decreased patient compliance. These drawbacks have sparked an increase in interest in non-invasive, safer, and plant-based treatment options.
The use of volatile plant extracts in aromatherapy, a complementary therapeutic method, has drawn attention due to its potential for managing stress and anxiety. Essential oils made from medicinal plants have bioactive components that can stimulate the sense of smell and affect neurological circuits. When aromatic molecules are inhaled, they engage with olfactory receptors in the nasal cavity and send signals to the brain's limbic system, which includes areas related to memory, autonomic control, and emotional regulation. The creation of a herbal anti-stress inhaler is a practical and portable approach to administer aromatherapeutic chemicals, and this neurophysiological pathway serves as the scientific foundation for the anxiolytic. Inhalers offer targeted, controlled, and quick exposure to volatile chemicals without systemic medication absorption, in contrast to diffusers or topical applications. The physiological underpinnings of stress physiology, the pharmacological potential of particular essential oils, formulation considerations for herbal inhalers, and their therapeutic significance in stress management are all covered in this review.
Stress
When confronted with difficult, demanding, or dangerous circumstances, the body naturally reacts physically and psychologically with stress. It sets off a series of events called the "fight-or-flight" response, in which the body is primed to act quickly by chemicals like cortisol and adrenaline. Long-term or extreme stress can upset mental equilibrium and have an impact on general health, yet short-term stress can inspire and improve performance. Conditions including worry, irritation, exhaustion, sleep difficulties, and reduced immunity may result from it. Stress management is crucial for preserving both physical and emotional health because stress has become a typical occurrence in today's fast-paced lifestyle for people of all ages.
Anxiety
Anxiety is a natural emotional response characterized by feelings of worry, fear, or uneasiness in situations perceived as uncertain or threatening. It is a normal part of life and often helps individuals stay alert and prepared. However, when anxiety becomes persistent, excessive, or difficult to control, it can interfere with daily activities and overall well-being. Anxiety activates the body's stress response, causing physical symptoms such as rapid heartbeat, sweating, restlessness, and difficulty concentrating. Modern lifestyle pressures, academic and work demands, social challenges, and health concerns often contribute to rising anxiety levels. Understanding anxiety and its triggers is essential for early recognition, effective management, and maintaining a balanced emotional state.
Lavender
Lavandula angustifolia, commonly known as lavender, is a well-known medicinal and aromatic plant belonging to the family Lamiaceae. It has been widely used in traditional and modern medicine due to its pleasant fragrance and diverse therapeutic properties. Lavender is native to the Mediterranean region but is now cultivated globally for its essential oil, which is extensively utilized in aromatherapy, cosmetics, and pharmaceutical preparations.
The essential oil of lavender contains several bioactive constituents, primarily linalool and linalyl acetate, which are responsible for its characteristic aroma and pharmacological effects. These compounds have been reported to exhibit anxiolytic, sedative, antidepressant, and mild analgesic properties, making lavender particularly useful in the management of stress, anxiety, and sleep disorders.
Ashwagandha
Withania somnifera, commonly known as ashwagandha or Indian ginseng, is a well-known medicinal plant belonging to the family Solanaceae. It has been extensively used in traditional Ayurvedic medicine for its adaptogenic, rejuvenating, and stress-relieving properties. Ashwagandha is widely distributed in India and other parts of Asia and is valued for its roots, which contain a variety of bioactive compounds.
The major active constituents of ashwagandha include withanolides, alkaloids, and sitoindosides, which are responsible for its pharmacological effects. These compounds have been reported to exhibit anti-stress, anxiolytic, anti-inflammatory, and neuroprotective activities. Ashwagandha is particularly known for its ability to modulate the body’s stress response by regulating the hypothalamic–pituitary–adrenal (HPA) axis and reducing cortisol levels.
Pathophysiology of Stress
Stress is a complex physiological and psychological response triggered by internal or external stressors. The primary systems involved in stress response are the hypothalamic–pituitary–adrenal (HPA) axis and the sympathetic–adreno-medullary (SAM) system. Upon exposure to a stressor, the hypothalamus releases corticotropin-releasing hormone (CRH), which stimulates the anterior pituitary gland to secrete adrenocorticotropic hormone (ACTH). ACTH subsequently triggers the adrenal cortex to release cortisol, the principal stress hormone.7
Figure 1 How stress affects the body
Elevated cortisol levels lead to increased heart rate, blood pressure, glucose mobilization, and heightened alertness. Chronic activation of this pathway may result in anxiety, mood disturbances, sleep impairment, immune suppression, and neurochemical imbalance.9
Simultaneously, activation of the sympathetic nervous system promotes the release of catecholamines (adrenaline and noradrenaline), contributing to the “fight-or-flight” response. Prolonged sympathetic stimulation may alter neurotransmitter levels, particularly gamma-aminobutyric acid (GABA), serotonin, and dopamine, which play critical roles in emotional regulation and stress resilience.1. hypothalamus—regions closely associated with emotion, memory, and autonomic regulation.4
Boswellia serrata (frankincense) is believed to influence emotional balance through anti-inflammatory and neuroprotective mechanisms, potentially reducing stress-induced neuronal hyperactivity4. This results in subjective relaxation, decreased anxiety levels, and improved emotional stability. The localized inhalation route allows rapid onset of action without systemic pharmacological burden, making the inhaler a convenient supportive therapy for mild to moderate stress conditions.
Stressful Stimulus
?
Brain perceives stress (cerebral cortex & amygdala)
?
Hypothalamus is activated
?
Two pathways start
1. Sympathetic Nervous System (SNS)
?
Release of adrenaline & noradrenaline
?
Fight-or-flight response
(increased heart rate, breathing, alertness)
2. HPA Axis Activation
?
CRH → ACTH → Cortisol release
?
Prolonged stress response
?
Neurotransmitter imbalance
(↓ Serotonin, ↓ GABA)
?
Symptoms of Stress & Anxiety
(worry, restlessness, sleep disturbance)
Drugs available for treatment
Several classes of medications are used to treat stress and anxiety disorders. These drugs mainly work by balancing neurotransmitters in the brain such as serotonin, norepinephrine, dopamine, and GABA, which regulate mood and emotional responses.
Major drug classes used for stress and anxiety include:
SSRIs (e.g., Fluoxetine, Sertraline)
SNRIs (e.g., Venlafaxine, Duloxetine)
Benzodiazepines (e.g., Diazepam, Alprazolam)
Azapirones (Buspirone)
Beta-blockers (Propranolol)
Tricyclic antidepressants
Recent advanced treatments
Recent research has introduced several innovative approaches for treating stress and anxiety, including new medications, digital therapies, brain-stimulation techniques, and personalized treatment strategies. These advancements aim to improve effectiveness, reduce side effects, and make treatment more accessible21.
Recent advancements in stress and anxiety treatment include:
Digital CBT and AI-based therapy platforms
Virtual reality exposure therapy
Brain-stimulation technologies
Psychedelic-assisted psychotherapy
New pharmacological drugs targeting novel pathways
Personalized psychiatry and gut-brain interventions
Mechanism of Action of Lavender in Stress Relief
Inhalation of Lavender Essential Oil
(main components: linalool, linalyl acetate)
?
Stimulation of Olfactory Receptors (Nose)
?
Signal Transmission to Brain (Limbic System)
(especially amygdala & hippocampus)
?
Modulation of Neurotransmitters
↑ GABA (calming effect)
↑ Serotonin (mood stabilization)
?
Reduction in Sympathetic Activity
?
Decreased Stress Hormones (Cortisol)
?
Physiological Effects
Reduced heart rate
Lower blood pressure
Relaxed muscles
?
Final Outcome: Stress & Anxiety Reduction
CONCLUSION
The creation and assessment of a herbal anti-stress inhaler using the essential oils of Lavandula angustifolia, Matricaria chamomilla, and Boswellia serrata, along with menthol as a supporting aromatic agent, were successfully proven in this study. The physicochemical appropriateness, compatibility, and stability of the chosen components for integration into a wick-based inhalation system were validated by pre-formulation experiments. Under both room temperature and accelerated circumstances, the produced inhaler demonstrated satisfactory organoleptic qualities, homogeneous oil distribution, no leaks, acceptable scent persistence, and good stability.
REFERENCES
Jharna Sahu, Harsh Sahu, Lekhraj Sahu, Anushka Sahu, Muskan Sahu, Suchita Wamankar, Chanchaldeep Kour Gyanesh Kumar Sahu, A Review on Herbal Formulation for Anxiety and Stress Relief, Int. J. of Pharm. Sci., 2026, Vol 4, Issue 4, 883-888 https://doi.org/10.5281/zenodo.19437235
10.5281/zenodo.19437235
