Close attention is needed when administering nectar pills. As ordinary beings, we cannot tell the real from the fake ones with the naked eye. The only way is by examining whether the pills came from a pure source. This is a very important step. If we are unsure of their source, we should just chant the Buddha’s names and omit giving the nectar pills to the soon-to-be liberated beings.
[Excerpt from Luminous Wisdom Book Series 1: The Right View ~ Liberating Living Beings]