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These are the probable reasons given for the superiority of the veerya over rasadi panchaka. We can imply these into clinical practices, for establishment of veerya of an extra-pharmacopeia drug.
These are the probable reasons given for the superiority of the veerya over rasadi panchaka. We can imply these into clinical practices, for establishment of veerya of an extra-pharmacopeia drug.
== Concept of veerya in the context of pharmaceutics ==
The intactness of veerya or efficacy is also termed as ‘shelf life’ of different pharmaceutical preparations. This concept was described by Sharangdhara<ref name="ref13">Sharangdhar, Sharangdhar Samhita, Paribhasha Prakarana, Prathama khanda, 1/51-53, sixted edition 2016, Chaukhamba Orientalia , Varanasi , Page No. 8</ref> in his paribhasha as follows-
* Powder (choorna) – 2 months
* Tablets (gutika), Semisolid preparation of medicine (avaleha) – 1 year
* Medicated ghee (ghrita), oil (taila) – 4 months
* Fermented medicinal preparations (asava), bhasma etc.- Efficacy increases with time duration/ have long term stability.
In some opinions, paste (kalka) and decoctions (kashaya), the veerya remains intact up to one yama (3 hours), in choorna for 3 paksha (45 days); in ghrita and modaka along with jaggery (guda) for six months, in guggulu preparation for 3 months, siddha rasa and bhasma for 3 years, and medicated oils for a considerable long time, the veerya respectively remains intact.<ref name="ref14">Veerya A general principle of drug action – Ayursoft [Internet]. [cited 2022 Dec 22]. Available from: https://ayush.digitalindiacorporation.in/Veerya-a-general-principle-of-drug-action/ </ref> <br/>Saviryata Avadhi (~shelf life) of various Ayurvedic preparations as per the guidelines mentioned in Drugs & Cosmetic act are as follows:
{| class="wikitable"
! Sr no.
! Dosage form
! Shelf life or date of expiry with effect from the date of manufacture
|-
|rowspan="4"| (i)
|colspan="2"| Anjana (Coryllium)
|-
| a) Anjana made from Kasthaushadhi (Coryllium prepared using herbs)
| 1 year
|-
| b) Anjana made from Kasthaushadhi along with Rasaushadhi (Coryllium prepared using herbs and minerals)
| 2 years
|-
| c) Anjana made only from Rasa/Uprasa/Bhasma (Coryllium prepared using minerlas and metals)
| 3 years
|-
| (ii)
| Arka (Distillate)
| 1 year
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