Exploring the Depths of Lac Equinum and Arsenicum: A Journey Through Homeopathic Proving Themes
By Sadhna Thakkar

Homeopathy is a fascinating field where the connection between the patient and the remedy often transcends the physical and delves into the emotional, mental, and spiritual realms. Two remedies that have recently captured my attention are Lac Equinum (mare’s milk) and Arsenicum Album (arsenic). While these remedies come from vastly different sources, their proving themes and symptomatology reveal striking similarities, offering profound insights into their healing potential.
The Historical Context of Arsenicum
Arsenicum has a long and controversial history, particularly in its use with horses. Known for its ability to increase endurance and stamina, arsenic was often exploited in the racing world. Jockeys would administer it to horses to enhance their performance, making them appear healthier, shinier, and more robust—qualities that would fetch higher prices at market. However, the effects were short-lived, often lasting only until the sale was complete. This practice gave rise to the saying, “That horse must have been jockeyed up on arsenic.”
In homeopathy, Arsenicum is a well-known remedy for anxiety, restlessness, and a deep sense of duty. Patients needing Arsenicum often exhibit fastidiousness, a fear of robbers, and an overwhelming need to protect their loved ones. These themes resonate deeply with the proving symptoms of Lac Equinum, creating an intriguing overlap between the two remedies.
Lac Equinum: A Proving of Frustration and Industriousness
The proving of Lac Equinum revealed a rich tapestry of emotional and physical symptoms. The overarching themes included frustration, impatience, industriousness, and confusion. Provers experienced a sense of being constantly thwarted, as if life was an uphill battle with no reward. One prover described it as “drowning in disorganization,” while another felt “corralled and reined in,” unable to move forward without interruption.
The mental state of Lac Equinum is marked by anticipatory anxiety, a fear of being late, and a tendency to imagine the worst-case scenario. This mirrors the Arsenicum patient’s anxiety about the future and their need for control. Both remedies also share a sensitivity to noise, irritability, and a dictatorial demeanor. Interestingly, Lac Equinum provers reported a strong desire for sour things, such as lemonade, which is also seen in Arsenicum.
One of the most striking parallels between Lac Equinum and Arsenicum is their sense of duty and responsibility. Lac Equinum provers felt a deep need to organize and declutter, reflecting Arsenicum’s fastidiousness and orderliness. Both remedies also exhibit a heightened awareness of danger, with Lac Equinum provers dreaming of someone lurking outside the house and feeling compelled to protect their family. This echoes Arsenicum’s fear of robbers and anxiety for others.
The emotional states of both remedies are characterized by restlessness and difficulty meditating. Lac Equinum provers described their minds as wandering, with thoughts that lacked depth or connection. This aligns with Arsenicum’s restless mind and inability to find peace.
Physical Symptoms: Overlapping Realms
The physical symptoms of Lac Equinum and Arsenicum also show interesting overlaps. Lac Equinum provers experienced headaches, stomach pains, and digestive disturbances, similar to Arsenicum’s burning pains and gastrointestinal issues. Both remedies exhibited sensitivity to cold, with Lac Equinum provers reporting cold feet and Arsenicum patients often feeling chilly and seeking warmth.
Sleep disturbances were another common theme. Lac Equinum provers frequently woke up in the early hours of the morning, a symptom also seen in Arsenicum. Dreams played a significant role in the proving, with Lac Equinum provers reporting vivid dreams of horses, danger, and teamwork, reflecting the remedy’s connection to the equine world and its themes of collaboration and struggle.
The Importance of Clinical Confirmation
While the similarities between Lac Equinum and Arsenicum are compelling, it is crucial to remember that homeopathic prescribing must be grounded in clinical evidence. The temptation to prescribe based on non-clinical connections—such as a patient’s affinity for horses or a snake—can lead to inaccurate prescriptions. As homeopaths, we must always confirm our remedies with proving symptoms and cured cases to ensure the best outcomes for our patients.
Conclusion: A Journey of Discovery
The proving of Lac Equinum has opened a window into a remedy that shares many themes with Arsenicum, yet stands distinct in its own right. Both remedies address deep-seated fears, a sense of duty, and a need for control, but Lac Equinum brings its unique equine energy—a spirit of endurance, teamwork, and the struggle against unseen forces.
As we continue to explore the depths of these remedies, we are reminded of the intricate connections between the physical, emotional, and spiritual realms. Homeopathy is not just about treating symptoms; it is about understanding the whole person and finding the remedy that resonates with their innermost being.
In the words of one Lac Equinum prover, “Everything was a struggle, nothing flowed.” It is our role as healers to help our patients find that flow, to ease their burdens, and to guide them toward balance and harmony. Whether through the fiery energy of Arsenicum or the resilient spirit of Lac Equinum, the journey of healing is one of discovery, connection, and transformation.
Sadhna Thakkar is a passionate homeopath dedicated to exploring the depths of remedy provings and their clinical applications. Through her work, she seeks to bridge the gap between traditional wisdom and modern practice, offering holistic healing to those in need.