पानं पानीयं चाउषधेन व्याख्यातम् ॥ कZ_०१.२१.११ ॥
pānaṃ pānīyaṃ ca auṣadhena vyākhyātam ।
As bebidas e a água potável devem ser reguladas pelo mesmo procedimento aplicado aos medicamentos (isto é, com controles de verificação equivalentes).
Extension by analogy: once a strict control is defined for medicine, the same control is applied to beverages and water without restating the full procedure.
Because both are direct ingestion vectors; water is a high-frequency, low-suspicion channel for poisoning.