In a quest to evaluate the effectiveness of Belladonna and Pyrogenium, the two prominent remedies for treating fever, this study was conducted in 42 rabbits induced with Baker’s yeast (in vivo study).

The Pyro 1000c, Pyro 200c, Bell 1000c and Bell 200c were used once a day and were compared to negative controls.

Pyro in both potencies significantly reduced fever in rabbits compared to the negative control group; Belladonna, however, could not induce such changes.

“Pyro possesses marked antipyretic activity in the rabbit’s Baker’s yeast fever model.”

Study Ref: Ahmad S, Abbasi WM, Rehman T. Evaluation of antipyretic activity of Belladonna and Pyrogenium ultrahigh dilutions in induced fever model. J Complement Integr Med. 2018 Oct 17;16(1). doi: 10.1515/jcim-2018-0127. PMID: 30335611.

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Sleep is crucial for every human being, and it clearly connects to health, disease, and cure in various ways.

The present observational study evaluated the value of homeopathic treatment on sleep quality and further on associated stress, anxiety and depression in 74 patients in a public healthcare service in Brazil.

The evaluation was based on validated sleep quality index questionnaires at baseline and at 3 and 6 months of follow-up.

The prescriptions were individualised in 26 patients who completed the study duration until the end of 6 months.

“Homeopathic treatment significantly improved sleep quality and reduced stress, anxiety, and depression.”

Study Ref: Fujino FMSDC, Ribeiro AP, Antunes DC, Gomez RJ, Furtado GE, Colombo-Souza P. Sleep quality and levels of stress, anxiety, and depression in patients treated with homeopathy: a prospective study in the Brazilian public healthcare service. Sao Paulo Med J. 2025 Oct 27;143(6):e20253033.

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The immunomodulatory effects of Thuja occidentalis, Carcinosinum, and Ruta graveolens 1M, 200cH, and 30cH on the immune system of Balb/c mice were studied.

The medicines were given orally for 10 days, and hematological and hemopoietic parameters were studied and compared with controls.

There were significant changes in the WBC count, bone marrow cellularity, α-esterase positive cells, antibody titer, plaque-forming cells, and enhanced proliferation of B and T lymphoid with Ruta and Thuja.

“The results suggest immunomodulatory activity of homeopathic preparations in high dilution.”

Study Ref: Valsalakumari Remya, Girija Kuttan. Homeopathic remedies with antineoplastic properties have immunomodulatory effects in experimental animals Homeopathy 2015 Jul;104(3):211-9.

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The placebo is a powerful confounding factor in research, but does it also apply to studies involving plants

This study aimed to observe the reproducibility of previous research by examining the effects of Arsenic trioxide (AT) in 45x dilutions.

The wheat plants were subjected to AT toxicity, followed by treatment with potentised AT (5x–45x potencies), potentised water, and diluted AT over a period of 9 weeks. Stem length was measured to compare all groups.

AT 45x induced a relevant increase in seedling growth and a variability decrease.

Significant stimulating effect on seedling growth and a significant decrease of variability were obtained with ultra-high dilutions at the 45x potency.

Study Ref: Maurizio Brizzi et al. A biostatistical insight into the As(2)O(3) high dilution effects on the rate and variability of wheat seedling growth. Forsch Komplementarmed Klass Naturheilkd 2005 Oct;12(5):277-83.

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Homeopathy is known for improving immunity.

In an attempt to observe the response of homeopathy in penguins in their reproductive phase, this study evaluated the laboratory parameters of 18 Penguins (male and female) in response to treatment with Echinacea angustifolia 6cH and Avena sativa 6cH (n=08) in comparison to the control placebo group (n=10).

The medicines were used in sucrose globules (and identical placebo globules) and were fed to the animals twice a day in the first 10 days of each month for 2 months.

The parameters studied were mean corpuscular volume (MCV), proportion/concentration of heterophils, and proportion/concentration of lymphocytes.

Conclusion: Treatment with Echinacea angustifolia and Avena sativa resulted in maintenance of lymphocyte levels in Magellanic penguins during the breeding period, thus aiding these birds’ immunity.

Study Ref: Franscinne Brait Narita et al. Evaluation of the Effects of Administering Ultradiluted Avena sativa and Echinacea angustifolia on the Haematological Parameters of Magellanic Penguins (Spheniscus magellanicus) during the Reproductive Period, Homeopathy, 2023 Aug; 112(3):198-204.

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Dilutions and homeopathic dilutions may seem similar to a layman, but these are entirely different from a homeopathic and scientific point of view.

The debate is decades old, and so is the research!

• In this study concluded in 1996, Dittman J and Harisch G undertook a series of experiments on cytochrome P450 2E1 enzyme activity taken from microsomal preparations from rats. The model was via hydroxylation of the synthetic substrate p-nitrophenol to p-nitrocatechol.
• The enzymatic activities were studied to see the influence of Arsenicum album and Kali cyanatum in simple dilutions as well as homeopathic potentized dilutions (ultrahigh dilutions).
• Significant differences were found between the effects caused by homeopathic potencies (D) and equally concentrated dilutions on the catalytic activities of cytochrome P450 2E1, glutathione-S-transferases, and uricase.

It was concluded that, “The results obtained suggest that these three enzyme systems are appropriate detection systems to hunt out differing effects of differently prepared dilutions of specific test substances.”

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Original Study Ref: Dittmann J, Harisch G. Characterization of differing effects caused by homeopathically prepared and conventional dilutions using cytochrome P450 2E1 and other enzymes as detection systems. J Altern Complement Med. 1996;2(2):279-290. doi:10.1089/acm.1996.2.279.

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• Apis mellifica and Histaminum have long been used in allergic disorders based on their clear symptomatology.
• It was 37 years back when B. Poitevin, E. Davenas, and J. Benveniste conducted the in vitro experiment for basophil degranulations with Apis and Histaminum. The experiments were blinded, and the basophil degranulation induced by anti-IgE was significantly inhibited by Histaminum (5cH, 15cH, and 18cH) and Apis (9cH and 10cH).
• It was concluded that,

“The investigation of the clinical efficacy of high dilutions of histaminum and Apis mel should be envisaged in allergic diseases in parallel with in vitro and ex vivo biological assays.”

Original Study Ref: Poitevin B, Davenas E, Benveniste J. In vitro immunological degranulation of human basophils is modulated by lung histamine and Apis mellifica. Br J Clin Pharmacol. 1988;25(4):439-444.

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• Nanoparticles and related research have always been an interesting domain of inquiry in homeopathy and ultrahigh dilutions (UHD).
• In this study, Nanoparticle Tracking Analysis (NTA) was used to study the material nature of NPs in UHD.
• Six medicines in various dilutions were studied (Gelsemium, Pyrogenium, Kalium mur, Cuprum, Argentum, and Silicea).
• The NPs were studied for size, distribution, presence of aggregates, brightness, scattering of light, etc., for all potencies as well as controls (pure water).
• It was observed that the sizes and size distributions of NPs in high homeopathic potencies were smaller than those in controls for soluble sources and larger for insoluble sources, even above 11 cH, along with appreciable comparative changes in other indices.

It was concluded that, “Homeopathic medicines contain NPs with specific properties, even when diluted beyond Avogadro’s number. Homeopathic potentisation is not a simple dilution.”

Original Study Ref: Van Wassenhoven M, Goyens M, Dorfman P, Devos P, Demangeat JL. Characterisation of Aqueous Ultra-high Homeopathic Potencies: Nanoparticle Tracking Analysis. Homeopathy. Published online August 21, 2024.

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• The information transfer and changes in the physicochemical aspects of ultrahigh dilutions (UHDs) have always been a challenging question.
• This study explores the transmission of physicochemical changes of three high dilutions of Arnica, viz., 6cH, 30cH, and 200cH.
• Medicines were prepared and placed in the receiver solutions in a contained manner, and the receiver solution was subjected to evaluation of physicochemical methods and UV/VIS/NIR to measure the specific effects of the selected HD transfer sources on the receiver solution, including electrical conductivity, pH, and ORP.
• The signals by high dilutions could be detected in the receiver solutions used for experiments.

It was concluded that, “The overall findings of the study offer valuable new insights … particularly in detecting the HD signal in solutions with varying pH levels.”

Original Study Ref: Jerman I, Ogrizek L, Pihir J, Senica M. Interactions of Highly Diluted Arnica montana Extract with Water Across Glass Interfaces. Int J Mol Sci. 2025;26(3):1115. Published 2025 Jan 27.

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• Addiction is not only an obstinate habit, but it also affects all domains of health—physical, social, and mental well-being.
• The study explored the integrative approach using ultrahigh dilutions (UHDs) as isotherapic and organotherapic therapy in rats subjected to opioid addiction (morphine) using the MORPH conditioned place preference (CPP) paradigm.
• The UHDs could restore the molecular neuromodulation induced by morphine.
• The study concluded that,

“To our knowledge, this study represents the first demonstration of the beneficial influence of ultra-high dilution medicines as a promising treatment for opioid use disorder.”

Original Study Ref: Fontoura MB, Oliveira da Rosa JL, Rossato DR, et al. Ultra-high dilution medicines can modulate dopaminergic molecular targets and ΔFosB in the Nucleus accumbens preventing morphine reacquisition in rats. Neurosci Lett. Published online May 14, 2025. doi:10.1016/j.neulet.2025.138256

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