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1.  PA02.12. Toxicity studies on shankha vati 
Ancient Science of Life  2013;32(Suppl 2):S57.
Purpose:
Shankha Vati, a classical Ayurvedic formulation that is widely used by the practitioners of Ayurveda, contains a heavy metal i.e. Parada (mercury) and a poisonous herbal drug i.e. Vatsanabha (Aconitum chasmantum Staff.ex.Holmes) along with other ingredients. There are certain apprehensions on this formulation, mainly due to the presence of its ingredient Vatsanabha. Shankha Vati (Bhaishajya Ratnavali 10/186 – 187, also in Ayurvedic Formulary of India Part1), is one of the formulations in which Vatsanabha is used without its usual coingredient and antidote Tankana (borax). With an hypothesis that classical combination of Shankha Vati is not completely safe and there could be some adverse effects due to the presence of poisonous ingredient Vatsanabha in it, and any possible adverse effects of Shankha Vati due to the presence of Vatsanabha will be nullified by the addition of Tankana to the formulation, another modified formulation with the addition of purified Tankana equal to the quantity of Vatsanabha in the classical Shankha Vati, was also taken up for the study.
Method:
Acute toxicity study as per OECD Guideline 425, and Chronic toxicity study (90 days with the recovery period of 30 days) as per AYUSH170 guideline (Guidelines for preclinical safety evaluation for Ayurveda, Siddha and Unani drugs and other traditional medicines in India) were carried out. Biochemical and haematological investigations were carried out on 30th, 60th, 90th and 120th days. Histopathological study of acute chronic toxicity study were carried out.
Result:
Histopathological study of both acute and chronic toxicity study were also carried out. There were no toxicity related changes found in the animals treated classical Shankha Vati as well as modified Shankha Vati in both acute and chronic toxicity study. Similarly biochemical and haematological investigations also did not toxicity related changes.
Conclusion:
Classical formulation of Shankha Vati is completely safe and there is no need to modify the composition to make it safer.
doi:10.4103/0257-7941.123876
PMCID: PMC4147529
2.  Pharmacognostical and physicochemical analysis of Tamarindus indica Linn. stem 
Tamarindus indica Linn. fruits (Chincha) are extensively used in culinary preparations in Indian civilization. Its vast medicinal uses are documented in Ayurvedic classics and it can be used singly or as a component of various formulations. Besides fruit, the Kasta (wood) of T. indica L. is also important and used to prepare Kshara (alkaline extract) an Ayurvedic dosage form. Pharmacognostical and physicochemical details of Chincha Kasta are not available in authentic literature including API (Ayurvedic Pharmacopoeia of India). The study is an attempt in this direction. T. indica L. stem with heartwood was selected and morphological, microscopic and physicochemical standardization characters along with TLC finger print, and fluorescence analysis were documented. Transverse section of stem showed important characters such as phelloderm, stone cells layer, fiber groups, calcium oxalate, crystal fibers, and tylosis in heartwood region. Four characteristic spots were observed under UV long wave, in thin layer chromatography with the solvent combination of toluene: ethyl acetate (8:2). The study can help correct identification and standardization of this plant material.
doi:10.4103/0975-9476.93939
PMCID: PMC3326798  PMID: 22529673
Ayurveda; Chincha; powder microscopy; tamarind; thin layer chromatography
3.  Sedative Hypnotic Activity of Manahshila (Realgar) -An Experimental Evaluation 
Ancient Science of Life  2011;30(3):78-83.
Manahshila (Realgar) is one of the three major Arsenicals used in Ayurvedic therapeutics since ages. It is indicated in skin, respiratory, ophthalmic and psychological disorders. It is mentioned to be the best among Rasayanas and a good aphrodisiac. As Manahshila is indicated in Unmada (Psychological disorder); wide use of Manahshila in the formulations mentioned for psychological disorders; some of those formulations are used in treatment of sleeplessness and Ardraka (Zingiber officinale Roscoe) which is a commonly used Shodhana reagent of Manahshila is reported to be sedative, the potential sedative hypnotic activity is inferred and an experimental study was carried out to evaluate the sedative hypnotic activity of Manahshila. Effect of Ardraka Shodhita Manahshila (ASM) on the spontaneous motor activity of albino rats in actophotometer and on diazepam induced sleeping time was evaluated. There was a statistically significant reduction in the spontaneous motor activity (P<0.001) in the ASM treated Manahshila and there was early onset and hypnotic potentiation in the diazepam induced sleep in rats (P<0.01).
PMCID: PMC3336258  PMID: 22557432
Sedative hypnotic; Spontaneous Motor Activity; Actophotometer; Sleeping Time Test; Psychological Disorders

Results 1-3 (3)